When I was in the third grade I went on a field trip to North Star Tree Farm, a Christmas tree farm in the foothills of the Sierra Nevada mountains. Every year since then my family has there to get our Christmas tree. It's a charmingly low-key place. In October they invite their regular customers to come early and 'reserve' a tree. This, quite simply, is fun. You tramp around the forest until you find a tree you like and then you get one of the employees to put a special tag on it. The best part, however, is in December, when you have to come back and scratch your head over where the heck you found that perfect tree (luckily, the employees write it down for you, so if you really can't do it on your own, they can locate it quickly).
Some highlights from tramping around: