Cool! Thanks for the info. We do a bunch of off-road events, and are usually really involved with the race, but last year we just did road blocks at the Prescott Rally, and were really just spectators. Since this rally is in our back yard, we're looking forward to being more involved.You'll doubtless be helping the service crews find their spaces and get set up. When cars start competing - and retiring - you'll help get information to the crews so they can recover their cars. When cars are in service, you may be called on to observe things like jackstand and fire extinguisher use. If you're a ham, you'll be doing the communications for the service area...answering questions like, "My car's not here. Any news on car xyz?"
This is the biggest advantage of working service. You don't get to watch cars go fast, but you do usually get ready access to hot food and flush toilets.Also, I believe the service area at Prescott is at the gas station again, so there shoud be ready access to food, drink and restrooms.