My cameraless, solo parking method requires no camera at all to position The Wonder Egg on a new site.
1- Walk the site first to note obstacles (to include overhead branches) and location of any hookups.
2- Use side mirrors to line up trailer and back about 3/4 of the way into the site.
3- Get out and physically step off distance from the back of the trailer to where I want it to finally end up.
4- Step off that same distance from my driver's seat, towards the rear and set down a marker (rock, twig, leaf, etc)
5- Back up trailer until my shoulder is abeam my marker.
Camera, Schmamera! I find this simple method works best for me.