Whatever you decide to do for opening of the rear, as a safety feature, wire it in w/ the reverse lights.
Personally, I'd use a linear actuator, but that's just me, and a motor would be just as easy and probably lighter.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
|