I work at Target. And while that may not be the best job, I just found access to free bedding. Most retail stores carry gift wrap, a heavier duty tissue paper similar to unprinted newspaper. And if any other retail stores are like Target, they don't use it too frequently. As I was leaving today, I thought about it since I'm setting up a new tub. They were more than happy to give me some up front as they have loads of it. I now have a stack of unprinted, beige 13.5"x19.5" bedding.
So, maybe next time you're at Target or somewhere similar, ask them if they can give you some of their gift wrapping at the registers.
I am the cheapest person in the whole world.