In the rocky mountain west area where I take my 240 RKS I've found it really varies on how big a spot you need. In the mountain areas of Utah, I've found that most of the forest service campgrounds don't have the room to fit side by side with the truck and TT, and many don't have the room to park the truck parallel to the road. Head to the desert areas and things tend to get wider so you only need to get a spot long enough for the TT. Most of the campgrounds I use require you to park the TT and tow vehicle in your spot, and don't have any other places to park the tow vehicle. Most of the full hookup sorts of places I've been to have areas you can park the truck other than your campsite, so again, no hard fast rules.