You already have the best boat for the Caney fork river, but if you want a boat that can fish several people then I agree that the Arkansas style boats are the best for the application, imo. Get a short one however since the Caney has some very narrow places and making long casts to cover the river are not required as would be when fishing middle or lower sections of a river like the little red.
The best fishing approach on the Caney is drifting in your Kayak with the fly below you about 30 feet or getting out and wading. Additionally, you will scare a lot fewer big fish by paddling over them than by running an outboard past them. Can you catch them after doing both yep, but my percentages are better in the kayak.