Are you hunting WI or MN? I think the baiting rules are different in each state. I hunted WI and helped buddies in WI. How often? Depends how often they eat it all? Could be weekly or daily? You don’t want them to run out of food and go find someone elses bait. I was only putting out 3 – 5 gallons of cookies and other sweets. I put my bait in a hollow log. I used mainly cookies. They kept in drums for about 6 weeks and were fine. I bought my bait from a cookie factory in River Falls. I will hunt them again this year (my second time with a tag). I plan to buy my bait in bulk from one of the bait dealers.
Here are the WI regs. Sorry for the poor formatting.
REGULATIONS ON BAITING1. Bait may be placed and used for the purpose of hunting bear or training bear dogs statewide*, except that no person may place, use, or hunt over bait placed for bears:• Beginning the day after the bear season closes and continuing through the following April 14th.• In excess of 10 gallons of bait at any baiting site.• That is not totally enclosed in a hollow log, a hole in the ground, or stump, and is capped with logs, rocks, or other naturally occurring and unprocessed substances which prevent deer from accessing the material. Liquid scent used for hunting of bear or training bear dogs does not need to be enclosed, but is part of the 10 gallon limit.• Unless, when the bait site is checked or re-baited, all bait that has been uncovered is again enclosed and made inaccessible to deer.• *Note: Baiting of any sort is not allowed on lands managed by the U.S. Fish & Wildlife Service.2. Additionally, no person may place, use, or hunt over bait that:• Contains or is contained within metal, paper, plastic, glass, processed wood, or other similar processed materials. A processed wood bottom may be affixed to a hollow log or stump using adhesive, nails, or screws for the purpose of containing bear bait or feed.• Contains any animal part or animal by-product.• Is located within 50 yards of any trail, road, or campsite used by the public, or within 100 yards of a roadway having a posted speed limit of 45 miles per hour or more.• Is contained in or replenished or deposited by an automatic, mechanical, or gravity feeder.3. No person may hunt over bait material placed for bear without possessing a valid unused Class A bear license and carcass tag.4. No person may hunt or train dogs over bait that is in violation of these regulations, unless the area is completely free of bait or feed material for at least 10 consecutive days prior to hunting, pursuing animals, or dog training.Note: Removal of unlawfully placed bait or feed material does not preclude the issuance of a citation for the original placement of the unlawful baiting or feeding material.