Depending on where you are looking Bass world sports has several as well as team supreme. If you dont have a partner ABA might be good- there are 2 circuits on the river (pools 16-17 and pools 11-13). Looks like you have residence in Mn and Mo- there are tourneys all over and you can fish in any district to qualify for nationals. It is a draw circuit, bring a boat use your boat.
here are some links
http://www.americanbassangler.com/ -main site to look up districts
http://www.qcbassfishing.8k.com/index.html – pool 16-17
http://www.geocities.com/ad4os/Dist73/index.html pool 11-13