Deer do eat maple leaves. I don't know where they fall in their order of preference though. Maples are pretty easy to identify, the leaves are obviously different than oaks, ash, hickory, beech, birch, etc. I'm sure an on-line search will find you some ID info.

You'll find maples mixed in with other forest trees on some drier sites, and you can find stands dominated by maples (red maples) on wetter sites. Then again, your hunting area may have few to no maples. If that's the case, and you have deer in your hunting area, don't worry about maples. They're always eating something, so key in on what they are feeding on.

For the first couple weeks of my archery season, it seems white oak acorns are the preferred food.