In referance to the "PM" to me.. Tiki Lagun is out of Stockton, and we're about 2 miles off the main shipping channel. Even thou it is a river, we get alot of sailing up this way and the Stockton sailing club has a large membership. As for the Marina, we're located about 8 miles out of stockton in the delta farmland. its not odd to see a tractor or hay bailer on the road next to the marina..
There is an airport in Stockton, about 15 miles from here, and if you need it any closer, there is a crop duster that flys the area often and lands in the fields.
The depth in the main channel is fair at around 50 feet.. in the slough where the marina is, its around 20 feet..
Like I said, its about 75 miles inland from San Francisco and about a days trip by water.
The California Delta is a place you can get lost really easy as there's over 1500 miles of usable waterways and parts of the river where it winds through the lowland is 2 and 3 miles wide..
For sailing, check out the Stockton Sailing Clubs web-site and you'll see, its a pretty active area..
Two of the big races around here are the South Tower Race, (a 24 hour event) and the Delta Ditch Run which brings over 150 boats to the starting line for a spinnaker run from San Francisco to Stockton.
If you let me know in advance, The wife and I will set ther day aside and take you and yours out for a sail. Check out the California Delta site.