first off welcome to the site!
well, I personally think you should just be honest, tell the man, you and your family are not here to hold anyone hand, as life has gotten busy and you don;t have time for it
IF your still willing to LET him hunt alone,(he needs his own tree stands and such) and for him to take deer to some place else to be processed
then so be it, just tell him your husband just cannot do like he has in the past, due to other things and space is not open for use anymore!
some folks take for granted you DON"T mind, so , some times you have to give them the chance to see things from your view, for them to change
I gather the work side will maybe make it tricky, but, at some point in life you have to stand up for yourself, or you will get used forever!
if that doesn;t work,
MAYBE try this,
tell him your no longer allowing anyone to hunt the property, as your saving if for family ONLY!
and then you have to follow this, or else it can come back to haunt you.,
as if they find out others are hunting it, ?? can back fire on you
can also mention that there is a new insurance policy that doesn;t cover others hunting the land/ but again, you need to NOT have others hunting it then?
and this might even be something you need to look into, as if someone gets hurt on your land, make sure your covered!