I really don't like aspen, but I do use it in my hognose enclosure. He burrows like crazy. I tried coco but he seems to do better with aspen.
I have a small exo terra cave style hide that I put in his enclosure figuring maybe he'd use it, maybe not...but he definitely uses it regularly. But from what I've read of hognose, they usually don't use them.
I also have small branches in his enclosure and he uses them all the time too.
I just grabbed some clean branches from my yard. I bake them in the oven at 200 for about 90-120 minutes. It kills off any parasites and can actually make the house smell nice.