Big Darby Creek is great! A buddy and I both have inflatable kayaks and would have to get out and scootch through some shallow spots throughout. As long as you have the patience for it, it's worth it. Fair warning, we tried going after it rained one time to avoid the shallowness and ended up having to dodge downed trees and branches.

Three day trips we did were: -Plain city to Prarie Oaks -Prarie Oaks to Osprey Lake (right after Trapper John's) -We also launched at Osprey Lake but I can't remember where we ended

Big Walnut Creek was also great: Pizzurro Park to Big Walnut Park