I'll try to answer all of these at once:
I'm in Mooresville, NC.
This is 550-600lbs, not 250-300lbs, so the idea of tipping it scares the crap out of me. I don't know that I could "walk" it. Dragging it once on the ground can be accomplished, but getting it on the ground is still the biggest challenge. An engine hoist/cherry picker won't get high enough, even with my low landscape trailer (certainly not in the bed of the pickup).
It sounds like renting a forklift or using a chainfall/come-along are probably my best bets.
Thanks for the help guys. If y'all have any more ideas, keep 'em coming!