FT and Boondocking - what RV length?

No one with 40 ft. can go everywhere, have something you can take off the back and drive the rest. You will not be able to park that far back or hard to get to parks. Anyone can take a 43 ft. down a road that is easy. Many of the places we go with a 30ft. class B +rig. puts us at the parking limit, I see no one larger ever there.I still say over and over 90 per cent never leave a four lane rd, some take a good two lane, most don't do that. If they do, where are they when I'm there, hiding behind a tree. Yet there is many places I can't go because I don't have 4x4 or high off the ground. I have tore my skids off three times in three years.I put steal wheels under the rear and broke off 3 out of four of them now. And I'm 30 ft., 40 ft. and over are for the interstate group, and then they drive a toat from there. Some will say that they drove a 43 ft. 50 miles on a dirt road, yes but it is bumpy, but not real sharp turns or big deep dips.