jksoft, some good info above. I'll be running that event, and look forward to seeing you there. There is an SCCA racing event there on Saturday and Sunday. Usually when SCCA is there, it's very difficult to get into the paddock area before at least 6pm. The SCCA guys are often not in a big hurry to pack up and leave. Possibly since this is a Sunday evening going into our event on Monday, they'll be a little more in the mood to get packed and out of the area for us. If you show up before that, gate security will direct you off into a parking area to the right of the front gate until they release us for entry into the paddock.
If possible, I'd also suggest that you get there a little early and help with setting up air fence. It'll give you a chance to see the track before your first lap, and in a way that gives you a good perspective. I'll be sending out a communication a little closer to the event looking for air fence volunteers.
The power poles are all up against the woodline on the right side of the paddock as you enter it. You won't be able to get a key prior to getting to your spot, because you'll need to have the specific power box number to get the key.
Welcome! And let us know if you have any more questions. It's great to be talking about kicking off the season!