So, what happened?
I'm home. Back in depressingly cold and rainy Tokyo (the weather has been truly crap this year).
The holiday was great. A very relaxing time. Spent time with my friends, read lots of books and enjoyed being warm just as much as I expected to (which makes being back here a bit depressing - it has to warm up soon though). I have no idea yet whether or not I put on weight but I suspect the answer is yes (I'll weigh tomorrow).
I'm writing this before I weigh though because I want to write down the positives.
1. I did do some specific exercise every single day I was away. I didn't bother to log it partially because logging was a pain and partially because I was so sloth like the rest of the day (and my profile is set to moderate activity level) that I'm sure I was burning a lot less calories than I would in a normal day in Tokyo even if I did no specific exercise.
2. I was certainly more mindful of my eating and ate less than I would have otherwise (and less than I wanted to!). I made an attempt to log it every day but it really was a bit pointless as I had no idea what I was eating.
So even though I suspect I put on weight the fact of knowing MFP was waiting for me will have at least minimised the damage. Now my aim is to get back into routine and try to continue the good habits I was starting to build up before this trip.