I don't recall having any problems standing in it. The wind doesn't blow it around as much as it would a canoe. I don't think its really an issue. I probably used about a 10 pound mushroom anchor with mine.
For what it's worth, someone once travelled the entire length of the Mississippi River in a Sea Eagle 9. It is probably the ideal choice for your situation. Just be aware that it will take a half hour or so to set it up and take it down each time.
[This message has been edited by gadabout (edited 07 February 2005).]