What size propane tank would you use for a heater on your driftboat? The bigger tank which is a 5 gallon/20# tank or the smalller 2.5 gallon/11# tank? I'm also going to use the tank for a industrial two burner cook stove when camping so I'd like the tank that I purchase to be able to be used for either. I will be doing the camping and drifting on seperate trips so the consumption of propane should not be a huge issue unless those types of cook stoves use a ton of propane. My camping trips usually are the three day type at most and my drifts will be day drifts. Any comments would greatly help. Thanks.