If you can and have the ability and you are truly concerned if issues pop up I would sugest pulling a slead and negating the space issue.
Not really practical to pull cargo sled from a trail machine. A touring machine maybe but I don't get much enjoyment from a touring machine. Plus, pulling a sled will kill the mileage range.
One of my concerns is that you don't know the area and that you are on a motorized mode of transportation. Why the conern about the motor?
Not concerned about the motor. Concerned about arriving at a gas station and they are out of two cycle oil. Or out of the brand the outfitter insists on for their equipment.
Having the GPS is great, but a compas doesn't take bateries!
I agree and a compass is already on my list.
Snow shovel. and if you are going into back country you need a hatchet/ax,
Folding shovel is on the list. Folding saw is on the list as well.