Not sure why this was such a complicated question. With many BLM and USFS dispersed camping areas there is no host and no ranger and it is first come get a site. We travel with a slide-in camper on a truck. No trailer and no toad, only the truck.
If we want to drive to a trailhead to hike for the day or drive into town for supplies or to a lake to go fishing we leave the campsite with our truck. I do not want to be a captive of the campsite during our entire stay in an area. If we have a boat trailer or toad or travel trailer to park in the site it would not be a concern, but we do not. Reality is that most of the places we go most trailers would not fit or even most motorhomes even without a toad.
Thanks for the people that provided constructive suggestions. Guess we will buy a couple of cheap expendible folding chairs and use a cable and lock to secure them to a table or fire pit grill.