An alternative route to get to the west side of Walnut Grove and Locke is to go up the Sacramento River rather than Georgiana Slough via the Moke. This route will take you past Rio Vista, Isleton and Ryde, and has more depth. But please don't rely on my advice - check your charts!
This is a scenic route with lots of places to stop and services along the way. The main disadvantage to going here after Boyd's Harbor is that you'll need to backtrack a bit. Unfortunately, the Ryde Hotel is closed mid-week. They do have a guest dock if you need to stop and tie up.
Some of the most exciting sailing (besides racing) that we've had on the Delta was a screaming run up the Sacramento River from Antioch to Rio Vista. Under double-reefed ancient cruising main only, we were hitting 11 knots through the water, while windsurfers from Brannan Island reached back and forth across our wake.
Christine Weaver, Doodette
Stink Eye, Laser 28