As mentioned before – fishing in the Mo River is not very popular around Omaha. The folks in these parts who fish for river cats do it in the Platte River – a Mo River Tributary. Schilling Park is in Plattsmouth, 15 mins south of Omaha, and has decent drive up access to the Platte within 1/2 mile of the delta into the Mo. Further up the Platte near hwy 75 offers decent access, and even further up river are the Lousville and Two Rivers Rec Areas. Both of which have Platte access. Most of the cat guides around here are way up river near Gavins Point Dam – 2.5 hours north of Omaha.
Heck, there are big cats in the Omaha city lakes if you want to fish for them.
If you want to go out large mouth fishing, I know a guy – my son – who’s always looking for a boat partner and he fishes the Omaha lakes weekly. But be warned, he’s pretty Die-Hard. I’ve learned to meet him at the ramp so I can leave when I want to, not when he’s ready, cuz he never is ready to leave.