Ditto here. I like my 14' in Numbers. You'll be fine with that experience if you're good at reading various aspects of water (current, rocks, holes, etc.). One tip: Be extra aware of how deep you're putting the downstream oar.
If it's your first time there get a few dozen yards or so behind someone you might trust to run a boat well. Watch where they go, their position, etc. Then, trust your own judgement! Oh hell, you probably know that.