Visitor parking at UCSD is readily available if it's in the morning. You need to buy a $6 parking permit. That will allow you to park in V (Visitor), S (Student), and B (Grad student/staff) spaces. You can also park in meters, but I believe they have a two hour limit?...after which you can just add more coins into the meter. Do not park in the A (red) spaces -- those are for faculty, and you will get a lovely $40 ticket. B spaces or metered parking is your best bet. You can buy a visitor pass on the street Gilman at the visitor information center, which is right by Skaggs.