Joel
A good option is to drive down the dirt road to salsipuedes bay and when you come around the point there proceed almost to the end where there are some picnic tables right across from jackass canyon. Launch there and fish jackass. This area is known for producing better fish on the rocky banks there.
This time of year can be VERY tough at Margarita however so I wouldn't expect any wide open bite. Look for fish very early and very late on super spooks or rio ricos. During the day fish something deep on the outer outer weedlines in 15 to 20 feet of water. This is where they hold during the summertime. Good luck, post a repot good or bad when you get back, I would love to hear about the bite there this year.
Oh yeah PS don't overlook a mid day frog bite. Worth a shot if all else fails.