Unattended propane appliances are not allowed inside RVs.
Propane dryers use a lot of gas, this adds weight.
The main reason they not a good idea is venting of exhaust, and receiving combustion air from outside.
You can get an electric dryer instead.
Propane Stats:
- Propane aka liquefied petroleum gas (LP)
- Odorless, except has added smell
- Colorless
- Source of 2 percent of US energy
- Used for heating, cooking, drying
- 20 lb tank provides 15 hours of cooking
- Homes use 1200 gallons per year on average