Planning to drive our 25-ft Class C from the Casper WY area to Tetonia ID and were hoping to take 20-26 to Riverton WY and pick up 789 there, to 287 to Hwy 28, then take 28 Spur to Miner’s Delight, Atlantic City and South Pass. Is 28 Spur paved and passable in an RV? Is there parking at each site? We would then take 28 Spur and re-join Hwy 28 and continue the rest of our route from there. Appreciate any advice!