I would check the state's or province's rules for that. It may vary, but usually you must keep some portion that identifies what sex the game was, and of course keep the tag. Should keep the rack too, to prove it was legal. In most states when transporting game, the tag must be attached to that game animal, regardless of whether its gutted, skinned or butchered.
As Cowgal said that would be a provincial law. Saskatchewan uses a two-tag system, for every licence you're issued a meat seal and a head/hide seal. The meat seal must remain affixed until butchering, the head/hide seal must remain affixed until min 31 Mar.
Being a bowhunting I've always been fanatical about scent control. Whether it's sprays, carbon clothing etc. I've tried it. The best thing that I have found for eliminating human scent is Betadine. It's been used in hospitals and homes for decades as a defense against infections on minor scrapes and burns. It can typically be found near the pharmacy in any of the major "one stop shop" stores, and a bottle will last multiple hunting seasons.
Before every hunt possible I...