My own critter raising has undergone a lot of changes in the last 2 1/2 years since I started raising the things. I've tried a zillion kinds of beddings, some quite exotic, when they used to be housed in the house... now it's simpler because they have their own building. I've also tried dwarf hamsters, and gerbils in addition to the mice and rats.
My biggest problem is that I'm awful at record keeping.... the mice procreate like mad, I'm overrun with extras, sell them to the petstore, then realize that my breeders are getting old, and suddenly instead of extras, I have a shortage! If I hadn't started breeding rats in the fall, I would be up the creek. I have been feeding all the snakes rats while the mouse colonies have been getting back up to speed.
I found that the best combination of bedding for smell reduction is pine, with a pinch (SMALL pinch) of cedar, some alfalfa hay, 1/2 teaspoon of imitation vanilla per gallon of water (not for auto waterers), and changing the cages every 3 to 4 days. The alfalfa pellets were fine, but heavy and actually more expensive in the long run.
The mice I have in 1.4 groupings and I would STRONGLY recommend keeping close enough records so that you replace them every six months. I'm getting ready to start new colonies once the babies currently growing up are old enough, I'll mark the date of the establishment of the colonies, and 4 months later I'll nuke that colony. It wouldn't be so bad if I didn't have almost 50 eggs incubating that need sustenance in about 60 days or so... luckily I should be able to do that, if I keep the rest of my snakes on a rat-only diet!
I do have a mouse website that goes into detail on a lot of the aspects of mice... which are really cool!
http://www.geocities.com/mousedomousery/