How much will you be using the generator?
1. Propane generators use a lot of propane.
2. When people ask about tiny generators the conversation normally goes to the honda eu2000, the small yamaha or similar. They use very little gas so you might not need to carry much with you. The honda is very quite.
3. I don't know of any tiny propane generators. I have seen people modify the honda EU2000 to run off propane, but it makes the unit bigger.
4. Have you considered solar?
5. How long will you be away from home for? Have you considered more batteries?