We've just decided on the spur of the moment to drive up to Maine to visit the in-laws' for the holiday weekend, so I'm scrambling to put a plan together! I've had variable success when visiting them before, but since I'm less than two pounds away from my (sigh - still "initial") goal yet again, I DO NOT want to blow it another time. This time, my husband is also on board after having lost several pounds, so I'm hoping that will help as well!
Here's my plan so far:
1) Hubby is calling his parents today to let them know NOT to fill up the pantry with high-carb goodies in anticipation of our visit as they usually do. I consider their kitchen a MINEFIELD for a dieter -- the Raspberry Pick'em'ups I can avoid but chips and little cookies are my enemies. They have been better about this since I've lost weight, but they still think they're doing my hubby a favor.
2) I'm taking my laptop so I can continue to log my eats in Diet Power. Just seeing the calories I'm accumulating (rather than eating mindlessly) has been extraordinarily helpful in the past.
3) I'm definitely taking my running shoes so I can get in at least a little run every day. Hiking is also a possibility, and I consider that a real treat.
4) I'm planning to take some of my own "snacky" foods, like jerky, so I will have something to gnaw on when everyone else is stuffing face. Otherwise, I plan to fill up on lots of fruit (great idea with the watermelon!), some lean meat, and veggies.
5) AVOID THE "CRAB APPETIZERS" at all costs! They're english muffins with American cheese and crabmeat. I would never eat anything like this at home, but they're a guilty pleasure that I usually end up caving into.
Anyway, that's what I've got so far. I also like the "no second helping" rule. Keep the suggestions coming, please!

They're very helpful.