If you're determined to travel during the holiday periods, though, book your vacation flights, hotels, and cruise far in advance. If it works with your schedule, fly on Thanksgiving Day or Christmas day; those are the least crowded days of the holiday season. And if at all possible, avoid traveling during weekends, on the days right before or after the holiday, and late in the day. It's not only crowded at airports but also northern storms can wreak havoc and create weather delays that cascade across the system.
Really my first bit of advice is that the best place to get a really nice hotel that is on a beach or a hill and has the other nearby and also has great weather in December is Phuket, Thailand. You could go almost anywhere in southeast Asia in December and get good weather and low prices. But Phuket has over 1,000 hotels and hundreds of those are wonderful fairly luxurious hotels or villa complexes that could be perfect for a romantic honeymoon stay.
While it's true that it might be a stretch to call Cusco's November weather “great,” this is perhaps the best month of the year to visit, and the weather is quite good anyway. The high season for hotels in Cusco ends in October, yet the rainy season doesn't begin until late December, so November is that perfect combination of small crowds, low prices, and very good weather.
I think the best place for what you want is Thailand. You can choose from Phuket or Ko Samui or one of many other islands, and they all have nice beaches and good nightlife at a very reasonable price. There are other places in Asia that have warm December weather, but Thailand’s tourist infrastructure is better than the others so it’s just much easier to get around and do what you want. Let me know if you have any other questions. -Roger
The rainy season usually ends early in November in Siem Reap, and the tail end of it is rarely fierce, so this is an ideal month to hang out in town and spend multiple days at Angkor Wat. November is actually the coolest month of the year, by just a bit, at least during the days, so most people will appreciate more moderate temperatures when climbing up and over all the temples.
If you decide to go off keto whilst you’re on holidays that’s ok. There are two ways to approach this. Give yourself a cheat day or cheat meal or go totally off for the entire holiday. I would prefer a cheat meal over a cheat day or cheat holiday simply because I know that one meal, while it may switch me from burning ketones to burning sugar, won’t make me feel too bad. I know if I have a cheat day or a whole cheat holiday then I feel sluggish, tired and won’t enjoy myself. It’s a personal choice but if you do decide to leave keto at home while you are on vacation don’t berate yourself for doing so. You’ve got a solid foundation on keto, especially if you’ve been keto for a while, so switching back on when you get home won’t be too painful. However, if you think that it will be a slippery slope to a total carbfest then maybe try to stick with keto. It can be done! If you have any tips or tricks for staying keto on vacation make sure to leave it in the comments. Knowledge is power and the more we share the better we get!
When you mention, “not too touristy”, the first thing that comes to mind is San Juan, Puerto Rico. I’m not sure if you’ve been there already or not, but one great thing about it is that the “tourist” areas close to Old San Juan are filled more with apartments than with hotels, unlike Cancun, where it’s nothing but hotels and timeshares. I can highly recommend the Condado neighborhood, which does have some large hotels but is mostly apartments for expats and seasonal visitors. There is even a free bus that goes from there to the heart of Old San Juan, which is a gorgeous colonial town filled with great restaurants, bars, and interesting attractions.
It can still be rainy in Belize in November, so it’s not an ideal time to visit. I quite like Belize and there is a lot to do there, including of course the second largest coral reef in the world. You can also head over the Guatemala border to visit Tikal and even down to Antigua for something different. You don’t get many great beaches there, but aside from that it is great.
You mention New Zealand and of course it’s summer there then, so it would be a good choice. However, all of these places will be crowded and near peak hotel rates if they are warm. So I’ll be happy to give you advice if you tell me if you’d rather visit one or more European cities in the cold season, or if you are looking for a warm place like New Zealand where it will be fairly crowded. By the way, the southern European cities such as Rome and Barcelona are lively and enjoyable that time of year, as the Christmas season goes on, and there aren’t too many tourists except for a few that travel to see their families around the holidays. So it can be a good time for southern Europe, as long as you don’t mind wearing a jacket or jumper during the day, and maybe a bit more in the evening. Give me a bit more guidance and I’ll be happy to try to help. -Roger