Melinda, I am so sorry I forgot to answer you!
I checked with concierge while we were at RP and they said yes, you can leave the car with no real time limit in the evening as long as you make the minimum spend, which of course is easy to do......
I think they know genuine folks from folks who are trying to evade parking charges, so you’ll be fine extending your evening at Strong Water....nice choice!!!
But, as always I’d suggest checking first........just in case it changes......I always thought there was a 3 hour time limit, but I’m not sure why I thought that!! Seems not.