the drift from carver to riverside park is the easiest of the floats on that river. unless you do a lot of backtrolling or anchoring and bobber fishing it can be a very short float though.
in my opinion the only scary spot on the whole river is the minefield, and it's not that bad once you know the right line. the corner directly above carver can get dangerous if you get sucked up by the wall, and the corner leading into highrocks right below the bridge can be dangerous too for the same reason.
Just read the water and pick a smart line and none of those spots will be a problem.
Where is the minefield?
The corner leading into highrocks, is that the one right adjacent to Clackamas River Drive where the river makes a right turn going down river?