Just talked to the local U-Haul branch. They have 2 cargo vans and a pickup truck available today. The cost for the cargo van would be approximately $62.38 (that's $19.95 rental for the day, plus an estimated $29.50 for 50-mile mileage ($0.59 p/mile), plus $10 for mandatory insurance). Distance from U-Haul to GVR is 17 miles on mapquest, so 34 miles for the round-trip still gives us 16 miles to play with as far as getting Hamaba-chan Mk.I from my place and Hamaba-chan Mk.II from George's. And, of course, we'd be looking at doing this again on Monday morning in order to get them back from GVR.
--Chris