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.
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.