Parking is often tight. Especially at jumpseat show time - I've always found a spot but often had to squeeze in to the last one available.

For getting to the pax terminal, you can call a cab - they're usually pretty good these days since customers are so limited. There are several that operate out of the airport area - you need to give them good directions as the Ramps address (2221 W Washington I think) is a bit confusing and may not properly show up. Washington avenue exit off the 5, head west towards the MCRD gate and take a left to the Fedex ramp. Worst case you can walk about 1/4 mile down to the SAN Parking lot (airport parking lot) and catch a shuttle there to the terminal.