Noticed a few parks downsized their sites in with the general trend away from big vans a while back. Expandas are helping reverse the smaller van trend.
Along with smaller sites, I've noticed a few with sloping sites (great for drainage but not much else) and some insane placement of utilities, fences, posts, etc. sometimes wonder if owners/managers have ever had a van. The increased popularity of free camping probably owes at least something to the dodgy sites some CP's are offering. Instead of ranting about free camping the CP's need to take a good hard look at themselves IMHO.
A bit of pre-planning helps find those CP's with good access or reasonable drive-through sites. Still reckon Nagambie Lakes sets a bit of a benchmark in Expanda friendly spots here in Victoria. Large, level, well grassed and drained.