You guys gave me some good advice regarding SF Bay so I thought I'd pick your brains again. I have this strange desire to head up the Sacramento River without a fixed destination. Just grab supplies & go. Thinking about putting in near Rio Vista, cruising most of the day and then spend the night. Return the next day. My questions are; Is that a good starting point? How far can I get? Any dams or other obstacles? Does it get real shallow? Any recommendations on where to spend the night? Any special attractions to see? This will just be a sightseeing tour, no fishing/skiing. Is the water too cold to swim in? I'll be in a 18' runabout with I/O. Any answers will really help. Thanks.