[capta]

Most inflatables with floorboards have the floorboards in sections.
I'd suggest leaving the larger ones in and removing the smaller one(s) in the bow and rolling the bow back to allow the dink to fit on your foredeck. It should be easy enough to slip the forward one(s) in if the bigger aft ones are in place and the rear tubes partially inflated, perhaps even in the water alongside the boat.
Otherwise you could get a set of davits and hang the dink off the stern w/o the motor. I doubt it weighs enough to alter your trim excessively.