John,
Now that I'm done laughing, First go to San Diego..
Continue on I-17 heading towards Flagstaff. You will come to the Carefree Highway turn off. About 5 miles north of Bell Rd. Take it.
Turn right on the Carefree Highway and continue down to CaveCreek road. maybe 4 miles If you can get there by 9am, meet up with the caravan leaving from the Chevron Station on the corner. If, not turn left and head to CaveCreek/Carefree. Go through CaveCreek and Carefree. After you get out of Carefree you will see a sign on the right side of the road directing you towards Bartlett lake. Follow this windy and twisty road. The road is long if I remember about 11 miles. The turn off to the cove is about 1/2 mile before the end of the road. look for a sign pointing towards rattlesnake cove. You will probably drive by it...I do.
If you get to the lake you have gone to far.
Now this is from memory of last years trip.
Mike