Memories are dim, but there is a "Red something" area north or west of LV. Lots of red rocks that you drive through, so maybe that is the name of it. And there is camping there, though it may not qualify as an RV Park as you requested.
Maybe this?
http://www.blm.gov/nv/st/en/fo/lvfo/...ampground.html
But maybe not. Seems to me there was something a bit more civilized, though not necessarily an RV Park. Spend a bit of time with Google - I'm sure there is something there.
Bill