OK, 10' Jon boat, so the trolling motor is your transom power source? You have a 12V motor and limited weight carrying capacity with the small Jon boat.
Suggest single group 29 to 31 size AGM and charge it with a 10 amp charger with automatic shut off feature.
VMAX makes excellent deep cycle marine battery however pricey.
Johnson Controls owns Intetstate, Optima and private labels for BPS, Cabelas, Sears, Walmart, Costco etc. AGM's in group 29 to 31 are $200+ range, wet cell deep cycle marine are around $100.
Suggest you consider placing the battery near the front and use 6 gage stranded wire to extend the battery leads. If the battery and you are at the stern the little Jon boat may sink!
Tom