First I would explore the HFS or shop online and grab a couple of new convenience products you've been meaning to try, so you're not in the kitchen all the time and it's still a treat.
Other than that, some things I've made on vacation include:
Bringing pre-made pizza dough and making pizza
Beans and rice
Made ahead casseroles (tamale pie, shepards pie, etc.) I bring the filling and then just top and bake.
"Bacon" Wraps w/ hummus, "bacon", shredded veggies, "mayo", etc. Wrapped in foil these travel fairly well.
Where are you going? That might give us some better ideas, if you're going to some tropical island you probably don't want a bunch of hot, slow cooked, food.