Give the motor homes away to somebody with the means to get them gone cleanly.
Or, if you have a project that requires thou to have a backhoe or small excavator on the property, make sure the scrap yard will take them with the bodies knocked off (including no title issues, or accepting them listed in your paperwork) then dig a hole, knock the bodies off and in, then towbar them across the scales
Also, sometimes you can negotiate RVs at the scrap yard, at a lower rate, best to take pics and go talk to a mid level guy in person
It will make a miserable mess, I have passed on a dozen free rvs, even when I really wanted the engine, or needed the money
Edit: if the tractor is old enough, they make wicked yard art at your front gate