Much of the advice about "having to have a hardsided camper" is _wrong_. Most of the prohibitions by campgrounds aimed at pop-up _tent_ trailers is because they are considered a "trashy bunch" (not _my_ assessment, just serving as the messenger). This attitude is sometimes visited upon truck camper owners, too. Whenever I dug into prohibitions regarding "softwalls" it proved to be the campground concessionaires trying to maximize their upscale traffic - - (read Class A's). They may say it is "because of the bears" but that is total 'BS'. Why would they restrict traffic to one campground when _all_ the campgrounds get visited by bears ??? (...Total 'BS'.)
There _are_ situations when campgrounds have acute animal problems and the managing authority might try to make special conditions for camping in those situations. That is when you should _run_ - - don't walk, in the other direction. Nobody should _want_ to camp in a place that has been the target of problem grizzlies. ...And I mean _nobody_. The only RVer on record having been killed by a bear was a healthy 25 year old man in a trailer. A desperate grizzly, late in the season, has no problem entering a hard sided camper. Their feeding instincts are very uncompromising at that point.
Fortunately, campgrounds resorting to special conditions are pretty rare. I doubt there are more than two or three campgrounds in the country at any one time that will advertise having a dangerous animal problem. And, many state parks have started to shut down such campgrounds altogether - - realizing that restricting to hard sided RVs is sending the wrong message (...that hard sided campers will make you safe).
Far more park visitors are killed and injured by bison and squirrels than by bears. Using the bear boxes can't hurt, but don't think it is something that only RVers that have soft walls should worry about. Using the bear box might make a bear more interested in the smug hardsided camper owner's rig than in yours. Better the door torn off his camper than off yours.
Testudo & Princesse Caribou
2012 FORD F-250 6.2L 4x4 EC SB SRW
2006 FORD F-250 5.4L manual trans (Sniff! Gone but not forgotten!)
2006 OUTFITTER SUPER-Caribou 6.5