They won't give out the wheeling locations unless you sign up, but if your looking for a ballpark on drive time I'd use the American Legion's address that they posted. I think it was about 20min drive from the trail to there last year.
sixety8msg- Usually takes the admin a few hours to approve new registrations so no worries there, you'll be able to post soon enough. As for your rig not meeting requirements, I believe there is an option to just go to the dinner. Get to shoot the poop with a bunch of other wheelers and meet some great new folks. They had the KOH video playing at last years dinner too and I'm sure they'll have this years video playing as well. All in all= Good Time