Getting rained on is a part of camping, and makes GREAT stories later.
I practically live out of a small propane grill. Having said that, don't forget the fresh veggies-in-foil trick. Chunk up yellow squash and zuchini, add a bit of butter and maybe some onion and/or tomato, seal all in a foil package with a dab of water, and set 'er on the grill. Or potatoes and butter. Or... well, you get the idea.