Vehicle Line for Park and Camp

I was just curious when they let people start lining up their vehicles for the camp and park spots and where the entrance line for that might start? Then what time do they let the campers in, is it earlier than the daily vehicle parking? Also I assume it's a seperate entrance and vehicle line from those who purchased daily parking but I don't really know if that's correct, can anyone confirm? Hoping some past camper have a little intel. TIA