On a 10’ Jon I would install a dry box to hold some dry clothes and a cooler for beer… I have been out once in a 10’ jon,,, once. I hope yours is more stable then the one I went in :-/. Standing up was not an option until you had a few beers in you, then it was easy. Getting back in the boat was the hard part ;D. Seriously, I would take it out a few times (assuming you haven’t already) before I did anything and see if it going to be what your looking for. Other then that keep it simple and don’t put anything in the floor or anywhere near where your casting from. Also, a stripping basket is most helpful when casting from a boat.
If you really want a small shallow water boat the 13’ Gheenoe or Riverhawk (Same family different name) is a rock solid little boat that will not flip.
Here are a few pics of mine
http://www.trophyfishingtn.com/coppermine/thumbnails.php?album=23