I would get ther as early as possible, just incase, tech is done on the main vendor road, when you register ask them where it is, tech only takes a few minutes, but since this is both atv and motorcycle weekend registration takes longer, even if your preregistered
As far as the parade lap they want you there ready to go, so I would say drive up in full race gear, gassed up, cameras ready etc at 245 right after the lap they will put you in a numbered staging line for the start
The parade lap is the best thng this year, no longer racing into the great unknown