A couple of things i would suggest,
Lay down some screen or mesh all around the seating area before you attach the seat,this helps to catch anything you drop also makes storage a little better.On mine i extended it in front of the seat about a foot i have a bungee cord across the frame to hold it up.I like this better then the bib.
For rivers you'll want flippers something thats easy to get in and out of with your wading boots on also you need some sort of safety strap around your ankle.
Rod holder or holders are good ,one out the front and another for storage.The one in the front has to be low enough or high enough that it doesn't get in the way of the oars.
Anchor is a must,for still water anything will do but for rivers you need something that will grab.My first anchor was just a lead ball maybe 7 lbs i found it wouldn't hold the boat even in 2' of water with little current.I always had to pull the boat up on the rocks and with flippers on it was a pain.Being able to drop anchor a couple of feet away from shore in 2 or so feet of water made it easier to get out of the boat walk back wards to shore then remove my flippers with out having to worry about the anchor slipping.
Also for still waters you'll want a front anchor, nothing heavy but it will stop the boat from swing around i just use a 3lb ball attached to some rope that i tie off on the front of the frame.
Those drink holders that attach to the underside of the seats work well also a place for your pliers and such.
Enjoy your new ride,IMO other then having someone row for ya its the best way to fish the Bow.