Not quite sure exactly what you're asking, so here are some i've run across before
I always really liked this custom COE one.
https://youtu.be/fdU2SUTDjmY
And this custom grand hauler one
https://youtu.be/v_vg-w45PQE
I hadn't seen this one yet
https://youtu.be/zVKMvijSfLA
One of the guys near Indiana runs a mighty Tonka car carrier trailer full of die cast cars, should have some pics in meets/shows section
But man that's gonna be a lot of juggling remotes to make it all work to load / unload