Okay, I was rafting the Yampa R. below Craig this weekend. I had rowed 30+ miles, it was past sunset and still a couple miles to go before my takeout. I had passed a couple public spots because groups behind me were portaging a diversion damn and I didn't want them running any further in the dark than needed and though I could make it out. I soon was surrounded by private land but wanted to get off the river before it was full on dark since it didn't look like I could make the take out before dark. I came across an good sized island in the river and pulled in to set up a camp thinking this is public since it is between the high water marks of the banks. Soon after a lady walked about 1/4 mile to yell out that I was trespassing and had to go. I ended up leaving and rafting in the dark to avoid shotguns or police but I really thought I was legit but wasn't dead sure so I didn't argue the point too much. I would normally not try to camp in a spot like that but I was abit screwed. Anyway, any experts out there know if islands public or private? If I'm wrong I want to know so I don't repeat the mistake. Thanks.