Take an add in craigs list, try to find someone who's driving up there anyway and has a hitch receiver. Offer to pay their gas or something along those lines.
Maybe post flyers at the local BEQ/BOQs in JAX? Military people travel a lot, tend to own trucks, and are more reliable than a random
stranger.
That's exactly the idea of uship.com. I used it once to get my stuff from Denver to SF. It's mostly small but professional movers that bid on your cargo. A lot of the time they are already making the trip and so are already making a profit. By bidding on your cargo they are trying to make a little more but the result is you can often ship your stuff for pretty cheap with small mom and pop operations. Something to try anyway. I like the idea of sailing it though!