Marvin, thanks for the heads up about the spare, and the inside specs for the 5x8. The extra space does make the 5x8 seem like the better choice.
I'll be pulling with a bottom of the line 4cylinder 2.2L Chevy S10 five-speed pickup, with a ball mounted right into the truck bumper. It might be a 2.4L engine, but I don't think so--have to check. Although the truck is rated to haul 2000 lbs safely without any special options, and the bumper mounted ball is supposed to be able to handle 350lbs tongue weight and 3500 lbs (if the embossing from the factory is to be believed...), I don't have a tow package on it and want to keep things as light as I can. I'm hoping that having the five-speed will allow me to compensate for any excess drag on the engine.
It also has an aluminum custom cap (I think about 400 lbs) and ~ 250 lbs. of camping and dog training equipment (jumps, cages, tents, tarps, etc.) lives in the truck bed all the time. All of that comes off the 2000 lbs it's supposed to be safe to haul without a tow package. I don't expect it to go fast, but I do want it to get where I'm headed eventually, and hopefully without undue wear and tear on the transmission.
BTW...I'm in central NY, smack dab in the middle of the state.

And hopefully with a tear in tow, I'll be able to go camping more often. We have two seasons in this part of the world--ten months of unpredictable precipitation and two months of frantic road construction.
