IMO the Mini Rio is not a good candidate for the task mentioned above. It is too small and the little motor with the ESC/radio combo unit makes it hard to avoid issues with heat build-up and signal loss at a range that might exceed the system's capability.
At $20 more, you will be better served with the RIO EP, the dual rudder turns the boat on a dime even at slow speed. The only thing you need to be aware of is that the ESC is non-water cooled, if you push too hard, it will fry. Also this boat is a ton of fun, so in no time you will want to make her run faster, as I did with a BL conversion, so now I am rescue-boat-less. :roflol:
https://www.youtube.com/watch?v=iCSzhyfHF3w