Russell, (Roslyn, WA)
Russell, I’m unaware if there are any modifications you can make to the spare tire access port, but if the camper does not require the additional support of the gate itself, remove the gate entirely before loading the camper. This applies only if the bed will support enough of the camper without the assist from the lowered tail gate. If the lowered gate is essential to supporting the camper, then the only other options are a front bumper mount for the spare, a roof mount (on the camper) for the spare or a rear mount for the spare on the back of the camper. I don’t think you’d want to risk running without a spare.