Size does make a difference. Case in point, just the last couple of nights at an Oregon SP. An older park with very few sites for larger rigs. Only 2 sites available with a hope of taking our 55'LOA. Site listed on the post as 51'. With trailer pushed into the bushes past the site pad & truck parked in front, right up to the pinbox, there was less than a foot spare to the edge of the narrow road.
Another 2' of trailer & we would have had to move on to somewhere else like the characterless private CG a few miles down the road @ twice the price. That was the one filled with big 5ers & class A's.
