We are planning a grand 'out west' adventure. We are two couples and me and my dog. The other couples have 'camped' for between 30 and 40 years each (and have done a couple of 'out west' trips over the years). I have my first camper for 3 months now. We will travel in two 31 foot fifth wheels and a 34 foot class C that pulls a Jeep. We're starting from Florida, on a southern route eventually north to Yellowstone where it gets worrisome to us who have lived in Florida for so long. If we head east from Yellowstone to Cody, what is the safest route to Buffalo, WY with the plan to get to Rapid City. We'll all be retired by the start date of the trip (so we're not in a hurry) and plan (so far) to leave Yellowstone around June 25, 2016, but wonder what to expect about the steep grades and pulling off if necessary to cool the brakes (if that is a correct rv term)? In general, any info about getting from Yellowstone to Rapid City is appreciated. One couple mentioned that I seem to noticeably hug the center line when going over high bridges.