Lolo Hot Springs Resort and RV Park

Getting ready for another season of traveling. Just wanted to let everyone know about last years experience at Lolo Hot Springs. My husband went into the office to see about an RV space. The young lady at the counter gave him a card to fill out (name, address, truck license number) he paid for the site in cash and as he was heading out the door, she says "Oh - I need a credit card". When my husband wouldn't give her a card, we were asked to leave. They did give us our cash back. I always thought cash was legal tender? Guess not in Idaho!