Hi everyone who offered help, we just returned to NZ this week..our RV trip was fantastic..better than expected..we did go down to St Louis then up through S dakota and through the Black Hills and on over to Wyoming, Salt Lake . Yes, we got some snow but it was all fun and manageable..saw heaps of wildlife in Yellowstone. Only had a few minor hitches..the RV from El Monte..was not in as great a conditin as we'd been lead to believe by the rental company, the heater broke in St Louis so we had to delay our travel by a day to wait for it to be repaired prior to heading North..the other thing that astounded us was the price of fuel..this thing was thirsty! a 6 bed RV ..it cost $150 every 2nd day..but I guess that is standard...otherwise it was so much fun and we learnt lots..we'll do it again. But try to go as small as we can in terms of size of RV..to see if that makes it cheaper. There are lots of factory relocation specials, so daily rental fees are not high. Thanks all for your input.
