first tip . . .
DESTROY THE ENVIRONMENT
Ok, so maybe that's not the best way of putting it. What I mean by that is bring as much "disposable" things as possible. I almost never use disposable at home, but for Powell, I make an exception. I will say however, I always like to use real silverware because I really HATE eating with plastic cutlery (plastic cutlery is not worthy of my food). The most useful disposable item is the tin casserole dishes to serve the food in.
At a regular grocery store they are kind of spendy, so always buy them at the dollar store. Its pretty much the only thing that takes me to a dollar store, which infuriates my children because they love it there. Paper plates, bowls, cups and napkins are an obvious must. Make sure to pack a couple black sharpies so people can write their names on their cups (something I forgot to do and we went through way too many cups). Paper towels, and clorox wipes are a must for clean up.
When you get home, walk to the grocery store with your reusable sacks to repent of your environmental sins.
second tip:
Big Bowls, Big Pots, Big Grill
If the kitchen you are cooking in is small, chances are the equipment is small too, so bring your own. Also, if you are a knife snob like me, bring one of your own knives. Now the pots and bowls I brought are HUGE, I got them at orson gygi. What I love the most is the stove top grill. Its a beauty . . .
Thinking ahead to what equipment you will need for each meal makes a big difference on the trip.