Going to an animals den while hibernating and collecting it I would not call legitimate.
As long as the laws allow it, it is though.
I do know this about rattlesnakes as well it goes for all snakes...If there is a food source for them they will be there.
Its simple root cause analysis get rid of the vermin and you wont have to kill them. Statistically many bites unfortunately occur from people try to dispatch rattlesnakes.
Don't get me wrong If i had issues on property with them I would not hesitate to take care of the problem. they have there place and that is not around me.