A two door with trailer seems would be harder than a four door without.
Yes the longer wheel base adds to the turning radius. About 9" to the total radius I believe. I find that by driving into a turn a bit deeper (go straight longer) and turning a bit harder it does make even the toughest of tight canyon turns. And if the turn is REAL tight (a two barely makes it) drive straight THROUGH the turn, steer opposite and back up about a foot - then make the turn. For example a hard left - go THROUGH the turn, steer right - back a foot and steer left and go. Harder with a trailer so if in a turn that even would choke a two door - you can get hung real easy.
A few back and turn? I've never needed more than one to turn just as tight as two door! And LOVE the extra room...
J Wm Bishop EA, ASADE
When I said that I was acceptably sane I may have exaggerated slightly.