I am a lifer here in WY and I have never seen that. I do know you can access BLM land, and that Montana does allow it in certain circumstances. I am about as remote as a human can be, the smallest ranch nearby, discounting town ( if you can call it that) is in the neighborhood of 15000 acres. Anyone who operates aircraft around me runs them off private strips or the public airports. I have never heard of anyone mentioning using public roadways. Of course my county has three sheriffs and a couple of highway patrolmen and is larger that the state of RI, so it may be just a case of no harm no foul if it does occur. Honestly I can't see why you couldn't do it safely as you are correct the highway outside my spread has a section that is ARROW straight and flat for 16 miles, 4 lanes and baby butt smooth, no power lines anywhere in sight. ( ok now I am going to have to investigate this lol I will keep you advised)
Rick