flw and bass as well have held tournaments out of the quad cities il/ia area but thats the only real spot they can put one on at along the river due to the needs for lodging and ramp ability to hold 200 rigs and then some
then there is the running from pool 16 launch site to either pool 13 or 18 where it seems alot of the winners int he previous tourneys have come from
as for lakes in the state of illinois i dont see a single one that the fishing will blow you over enough to bring a big flw or bass tourney to the area
remember 3 years ago the classic was in chicago on lake michigan and they had a very low fish count very low weight total and hardley no audience so i can see why they dont fish here consistantly
just my thoughts