Free: Contests & Raffles.
Bison do eat grass, and damage fences, and transmit brucellosis. However, those aren't the significant issues; it is a matter of conflicting management between two federal agencies, and the adjacent states and their ranchers get caught up in the bull pucky as a result.The US Department of Interior-Park Service, and US Department of Agriculture-Animal and Plant Health Inspection Service create an impossible regulatory scenario. The Park Service pretends YNP is an ecosystem, and allows no management of wildlife within its borders, so YNP is a reservoir for brucellosis (yes, it came from Europe and cows). At the same time, if brucellosis is detected domestic cattle, USDA revokes the states' brucellosis-free status, affecting the viability of every ranching operation in the state.The states of Montana and Wyoming (maybe Idaho has been affected too) are between a rock and a hard place, thanks to the regulatory empires of these two departments of the federal government and their unwillingness to work with the states to attain a reasonable compromise. Montana, in particular, has been dumped on for being forced to take draconian measures to attempt to prevent a brucellosis infection detection in cattle. It is not a question of the disease consequences on individual ranches, it is the federal hammer on the entire states' cattle industry - it is a regulatory conundrum for which the states are thrashed by the feds.
Great info bigtex, that helps a person understand numerous issues regarding parks.