I assure you that an anchor trolley system works quite well; they've been used for many years in the kayaking community. Remember, your anchor line isn't attached to the side of the kayak (you'd be broadside to the current....not a good thing in any boat)....it's attachment point is at the prow (you're facing upstream in the current) or at the stern (where you're facing downstream)....either way a pointy end of the kayak safely faces into the current. A simple float down the river with others in kayaks hardly justifies your confidence (no offense intended). As for getting a 'stuck anchor' unstuck....worst case you simply release the anchor line (it's attached to the cam cleat near your leg, it whistles out through the anchor trolley carabiner (up at the stern or bow)....you're not out much...and it's the same lost anchor scenario with any craft). This is really what I mean about these two outdoor interests generally not being found in the same people; it results in many faulty assumptions being bandied about.