Re: kayak setup
New guy here on learning fly fishing, but have a bit of experience with yaks. I would fish out of the yak a few times before you add much. I've fished for crappie from my yak via trolling/drifting and shoot some docks as well. Wanting to try the fly fishing from the yak and I have a Ride 115, which can be stood up in but I have not gotten the nerve up yet. Later this year I hope. I've wondered about the fly line in a yak, and how to deal with it, etc.
My Ride 115 has slide tracks made for attaching rod holders, FF's etc., very easily, and can be removed easily as well. Google is a good friend to have, there are several good yak fishing forums out there, they will give you lots of ideas as well. GL