I have heard that there is a nice camping area somewhere in the East Moline IL area (maybe Hampton Dam ???) just in front of the Mississippi river specifically for fishing. I believe you can rent an overnight stay(tent) for just $10. My son and I would love to go there sometime.
i take my family to johnson-sauk state park just outside of kewanee,il. off 80. they have a great campgroud ,a nice lake , boat rental,concession stand and restaurant. check it out on-line. its a great place.