Pat Kelly’s Alternate Route:
This avoids I-80 altogether, esp if you’re coming from south bay, or there-abouts.
- Go east on 580, pick up 205 to I5 to Stockton
- Exit I5 at state highway 4 (the freeway exit, just after Charter Way)
- Connect with 99 North.
- Continue on 99 past Lodi, Galt
- Just before Elk Grove, exit onto Grant Line Road
- Head east on Grant Line about 5 miles or so (it sometimes seems forever)
- Turn left onto Sunrise, 
- North on Sunrise about 5 more miles, 
- Left onto Douglas and 
- Straight into the site; you will see the cones and cars
Advantages are no bridge tolls, and a stroll back through time along the old but quick 99, plus among the least expensive gas stations (Chevron) at the Grantline exit, anyway, much less expensive than most stations here.
No matter which way you take, the gate is marked with pointer cones.