I would highly recommend driving to Colorado Springs. There are a ton of cool things to see and it's a 50 minutes drive. Google these things and check them out, they're a must see for anybody visiting Denver/Colorado Springs.
* Seven Falls
* Cliff Dwelling
* Garden Of The Gods
* Cave Of The Winds
Of course Pikes Peak will be closed down so you can't check that out. If you don't want to drive to Colorado Springs, as many have said, it will be cold for hunting/camping. Maybe do some horseback riding. You could always head up to Golden and check out the Coors plant.