Trust me after 40 yrs of river fishing both sides of the border,,,,,SMALL is NOT good. !6-18' is plenty if good freeboard or very flat and /wide . NEVER scrimp on horse power. Spend a few more bucks and save your life. I see just way too many underpowered and undersized on the Fraser,,,,we call them DEATH traps. Its just NO place to take chances.
I run a 17' custom made small sled with a 90 jet outboard ,,,,lots of power and an 88" beam and have had some scary times when those river tugs come by throwing a 5-6 ' wake. BE safe guy..............