Just don't go nuts on food and alcohol but have fun.
It is a holiday.
Eat 3 meals and a couple of snacks- try to eat protein every time you eat.
Unless you are lying on a beach for 10 days then you'll be doing lots of walking.
I went away for 10 days recently, to Edinburgh.
Didn't train at all, ate pretty well, no alcohol, did a couple of runs (great way to see a new city)
Came back a couple of lbs lighter. Nothing noticeable, no muscle loss.