Similar situation Mike, EXCEPT, the McLaren is easy to get out of once in the trailer. With that said, I never drive the car into the trailer. I winch it in and out...the winch is essential. My car is 73" at the wheels, and 83" on the spoiler, so it is tight, and doesn't have much margin for error if I was to try and drive it into the trailer without another set of eyes. With a remote winch switch, the winching is super easy.
My 3' overhang up front required a set of fabricated ramps that prevented dragging the nose. My trailer is a 20' Interstate Victory trailer, and appears to be well-built. I contemplated a 24' trailer due to some tight turns I needed to negotiate, and to date have no qualm going with the shorter trailer. I have no choice but to use an enclosed trailer due to the nature of my car, as well as distances needed to find a nice track, and simple security for the car and supporting equipment.
The ramps were an easy affair of 6' long 2 x 12 wood, three layers deep so that the ramp-door edge sits on the high end of the ramp, allowing the car to "step up" each layer until safely on the door-ramp. I installed E-track on both walls so that I could easily install overhead beam/shelves to carry stuff as needed, and other shorter E-track sections for a hammock for those times when I just want to rest. Bought a bunch of LED lighting for the inside, which has been great for night set-ups.