I did a bit of research about this, since I'll be driving there. If you want to park at the hotel, it's $27 a day/night. ( =/ ) There are street meters though that only charge from 8am -6pm Monday through Saturday. It's probably a $1 an hour for those.
What I'll probably end up doing is get there around three(after picking up a powerful trainer from the airport), then park on the street for some of the day(s). They have pre-paid meter cards you can buy iirc, so you don't feed the meter beasts for time you aren't parked. That way when we go to the beach/In n out/etc you aren't wasting money.
As for hotel, proximity, no clue. =( The convention center is really close so there will probably be little/no problem with parking.