Can just anyone take a shower in a truck stop?

Question

sometimes when I travel and stop at a truck stop they have showers in the bathrooms. Can anyone use these or do you have to be a trucker? I'm asking because I'm buying a 2001 minivan to drive across the country and i want to sleep in it and then take showers in truck stops, but only if I'm allowed.

Anyone know? Or if not there where ccan I take showers if I'm sleeping in my minivan???

Answer 1

Yes you can