You can do it pretty easily. You'll have to carry your treestand such that there's no contact with the back tire, which may be a problem depending on what kind of stand you use. I tied myrifle onto the stand and hauled A$$. If not using a stand, just get a hunting backpack that has some strap loops on it, and tie your bow/rifle to your back, it's really easy.

A potential problem is the type of trail - if it's a flat, even trail, you're golden, but if it's uphill/downhill and rocky, biking in the dark is tough.

I biked in on a public biking trail along a river for rifle season, so it was fairly flat and free of obstacles.

You'll also need a good LEDheadlamp. Energizer sells a WallyWorld cheapo for 12 or 13 bucks that is really good and durable. Make sure you lock up your bike while you're hunting.

If you kill a deer, you're stuck taking your bike/gear out and hiking back in for the deer. I usually just go home, getapickup and a buddy and go back for the deer. There's really no easy way for that - but there is a company that sells a lock-on treestand that doubles as a pull-cart. That piqued my interest a bit, but for this season, I'll be doing it the hard way.

On a good, flat trail, you can bike in swiftly and silently. You can turn a 1 hour hike into a 10 minute ride.