Working on a short little boat to use on some flowing creeks to fish from and will need to run some shoals and an occasional small rapid. I want a boat that doesn't track tightly, but can turn quickly if needed. This boat is will be about 13' +/- long.

So, to keep the tracking rather loose I am thinking that I want to keep the bottom mostly flat with only a minimum of 'V'
Keep the ends full, no fine entry. T to much like a rudder.
The shorter length should mean loose tracking but I want small anyway.

Anything else I need to consider?