Spare Parts To Carry

I try to carry as few spare parts as necessary. However, there are a few that I consider to be mandatory. Fuel and oil filters for engine and generator and fan belts for engine and generator. Spare light bulbs for tail and blinker lights but not headlight (pick that up anywhere) as well as porch or similar lights. Otherwise, I have every tool I have ever used even once. No spare tire and no tools to change a tire (that's Good Sam's road service's job). Duct tape and all forms of oil are always on board. Most anything else can be dealt with at the next destination or at the next service appointment.