Be advised, though we are having this rally in mid-April, for those who haven't been there before, the location is on top of a high ridge-line, and the nights there get COLD. A couple times there was light snow present at some time during the weekend. If you plan on sleeping overnight there, in a tent or in the back of your truck, pack clothes and a sleeping bag as you planned to camp in the WINTER. You can always dress down if it warms up, but be prepared.
I plan to bring some firewood (we always seem to bring more than we burn, but I got TONS of fallen timber around here and no way to use it up), and maybe I can snag a M101 trailer to camp out of there, rather than try to fold myself into the back end of my Dodge. Last time doing that my back was killing me from being curled into a pretzel.