They already exist. All you can try to do is determine the parameters around which they are issued.
It's a good point. There are already landowner set asides for deer, there's the 454 program that got hijacked by the billionaires & their lobbyists, there's the landowner preference, etc. What does MT get out of those? PLPW has a great role in finding a better balance with the 454 program and eliminate the corruption we've seen relative to the new law change in the last year.
There should be a report out in the next month or so relative to western states landowner voucher programs that looks at hunter satisfaction with those programs. Nevada is routinely held up as a good model for landowner vouchers, while UT and CO are held up as the worst examples (including from former managers of those programs).