Quite a few fisheries within a couple of hours of Sacramento, although we've had such a dry winter, very hard to say what will be fishing well by July. For early July, I'd probably head for the Truckee area which is just about 2 hours east of Sac, and an easy drive. Lower Yuba is a bit closer (east of Marysville), but I've no idea how it'll fish. North Fork of the Yuba might be in pretty good shape at that time (area around Downieville). The East Carson (Markleeville) is a bit outside your range, but might be OK as well. Finally, if you want to try a drift boat trip, and add another hour to the drive, the Lower Sacramento near Redding should be worth a shot.

Considering that you have some lead time, I'd make a point of calling around the local shops now, and again when the date approaches. Kiene's Fly Shop in Sacramento (http://www.kiene.com/), The (Redding) Fly Shop (http://www.theflyshop.com/), and Tahoe Fly Fishing Outfitters (http://www.tahoeflyfishing.com/) would be my choices for information on the areas mentioned.

Good luck.