I've heard that cedar is not good, but not sure why.

What I do is every fall, I collect all the leaves that fall on my property. I either mow them over a few times with the mower or run them through a leaf shredder/blower. I then put them in the large Rubbermaid tubs and then use that as bedding all year round. I do deep bedding, and just layer the shredded leaves on top. this keeps the leaves on my property and makes it so I never have to buy bedding for them, and it makes compost to add back to the garden later.

hope that helps.