Washington state OHV Alliance did a event in Olympia a couple of months ago.
Cal4Wheel has a day in Sacramento, but this one is organized with CLORV (California League of Off-Road Voters).
CLORV has a web site, and the Washington Association does to.
I am sure others have done it also, and hopefully they will post up.
Maybe something to bring up at Convention about building a lessons learned from the groups that have done a ralley, and what they did right.
Interim Dir of Env Affairs