Namelus,
Get bags of salt (minerals) not the blocks. The deer and other critters will eat the dirt/ground around the salt block rather than munch/lick it.
Salt piles melt into the ground and are less conspicuous than the blocks. Saw a number of poachers get caught by shooting over blocks. The DOW guys had seen the blocks and just waited.
Piles of fruit like apples also work well for ‘baiting’ deer. Doughnuts/pastries work well for bears.