camper jacks or something ? help

[Fast68Chevy]

i need ideas or info or something,
have a camper, a big huge heavy one that i need to get off the back of a pickup without damaging it because its nice looking one,
i dont have any jacks and i dont yet know of any that anyone has around here,, no one has campers on their trucks around here,

i have no way to make any kind of overhead deal and no overhead structure of any kind or anything like that here, so..,

anyone know of any ideas/tricks ?

are camper jacks expensive ?
i dont even know what they look like lol.,

thanks for anything,