Free: Contests & Raffles.
It's hard to tell by photo but that doesn't look any faster than the stuff I trap. I would find your pinch points and just set it. I once took a bread sack tie and gave it a single wrap just to be sure but in hindsight I don't think it made any difference. Debris can be a problem but it's mitigated by checking ever day.The inside bends of the river typical are not as swift. I will also set perpendicular to the flow in places where they are climbing up. Just don't wire a dive stick to your trap unless you have the trap wired off.
Learned last year and this year again: ALWAYS CABLE OR TIE YOUR TRAPS DOWN! Flash flood came through and pushed two beaver traps 25 yards down creek. Took me hours to find them now all my traps have a piece of 1/8 " cable with ring on the end. Rebar stakes keep things in place well