In Wyoming you can't use unprocessed bait and you have to use an approved bait container. G&F does not want bears to get used to "food rewards" by using other baits or allowing bait piles to be placed. Biologists I talked to want to discourage the use of fish and game meat especially. Another reason I don't hunt over bait other than gut piles left by other hunters. It is illegal to use wild game meat as bait (explicitly prohibited), yet you can hunt over a carcass or gutpile as long as YOU did not specifically place the viscera or carcass there to bait bear.
And I am going to correct myself. Below is cut and paste on what kind of bait can be used in specific areas. Keep in mind also, that the second a grizzly hits on a bait site, that bait site is closed for remainder of the season and you can't hunt on it.
(b) Only unprocessed baits shall be utlized for the baitng of black bears in Black Bear Hunt Area 18 and those portons of Hunt Areas 19, 20, 21, 23, 24, 27, 28 and 29 in which bear baitng is not excluded by Secton 6(a).
(c) Processed or unprocessed baits shall be utlized for the baitng of black bears in Black Bear Hunt Areas 1‐17, 30, 31, 33, 35