More than a few years back I was faced with the same embarrassing situation - a woodworker that did not have enough clamps! I believe the post was titled "Oh the shame of it - WWer with too few clamps.". I too publicly acknowledged my failings
(at least as public as NCWW is!).
What saved me were several generous offers to lend clamps - like Bill offered you above. At that point I was able to borrow enough clamps from a single individual and therefore did not have to drive all over town (I was gluing up a 4' wide x 10' long table top and needed 8 or so, and had 2).
Anyways there are work-arounds, but if I were you I'd look to borrow a few. As far as I know my 2 longest clamps won't span 6'; if you want me to check I can, but I don't think so. If you want 2 you can certainly borrow mine, but we'd do a length check first. I am in SW Raleigh near Cary. Depends on where you are in Durham, Bill may be closer.