Last time we rented we were quoted $100 per day. It was off season.
For an RV that sleeps 4. You will probably want the 25' coach. Your best bet is to call them so that they can let you know what all the fees are. The rate that I got for the 30' included 1,200 miles and a per mile over that. There is a one-way fee, propane usage, generator usage, per day fee, sewage dump fee (unless you dump before you return), etc.
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