I'm going away for 10 days, too! First of all, it's always possible to make sure you are physically active, even if it's not "exercise." For example, you may be able to take a walk or a quick run now and then... or go up and down stairs in your hotel a few times... things like that. Also, it's not hard to do some abdominal exercises almost anywhere, or some pushups, some squats--and so on!
I've seen some travel hand weights that you fill with water at your destination to make them heavy, and then you empty them for packing.
Plus just doing your job may be physically active!
The main thing is to be aware of what and how much you are eating. If you keep track of your calories, you should be fine. You know what foods tend to have lots of calories--and you need to control the portions. You might go over your target, but even if you do gain a couple of pounds, you can't undo all your hard work in a few weeks unless you go completely crazy!
So, have a plan.
And check back in after your trip! Let us know how it goes for you.
Jay