We drove I 70 recently thru kansas is really nice road! Going from kc to cheyenne in a few weeks thought we'd try I 80 route just for different scenery, is it a good road, truck traffic?
Both I70 & I80 are major east west interstates and will have major big truck traffic. Cross country you will see more. Get a truck Atlas, if a truck can travel it so can an RV.