To start, I have IKs and Plastic boats so I'm not trying to sway you away from a boat for any biased reason. Why not get an IK for the day trips and a Raft for everything else? I know it's one of those unsolicited off topic suggestions, and I understand you're being conscious of your impact. I thought I'd just throw it out there.
On the river, I can abandon who I am and what I've done. However brief it lasts, while on the river I am nothing important and everything insignificant. I am flotsam, and happy to be so.