There are lots of semi-decent RV parks within 20-30 miles of JC.
If you're in the neighborhood anyway, why not go and see what all the excitement is all about. There are sales going on, so if you need a bit of this and that, well you'll fight a few crowds, but it's not often someone from N. Dakota is going to get to the mothership.
So, make it a day trip.
Today is a gift, that's why they call it the present.