I don't know how it is out there in the rest of the U.S., but here in Minnesota there's been enough governmental chipping away at the 4x4 community that there isn't as much interest in building up mud trucks as there used to was. Offroading on public roads is now confined to marked trails, and nearly all trails are open to ATVs, most to motorcycles, and only a handful to trucks. There have been some high-profile prosecutions for "malicious damage to wetlands" of people offroading on their own private land. You can't really play in the mud unless you are in a really remote area or can claim that what you're doing is farming-related, since that's one of the few safe harbors. The gov isn't entirely to blame since many people who used to drive Jeeps or built-up trucks have moved to ATVs. I don't know when the heyday of the 4x4 pickup was exactly but it now seems like it's in the past.