sugar creek is a good paddle, say from darlington to turkey run. or from crawfordsville. been awhile, but i spent a bunch of time on that creek when i was a kid. the fishing seems to be pretty good these days, too.
I kayaked sugar creek for a few years. Started in Darlington and would go as far as I liked. Lately, its been too shallow except for right after a decent rain.
Wildcat creek north of Indy is an old favorite of mine but I would avoid it for now if the water level is way up. Same goes for any creeks or small rivers.