Due to some costing and UoM issues from our go live, we need to do a new physical inventory, and we are planning on importing Inventory Worksheets...However I do not believe I can set bin information on those imports. Is there a way to do a mass bin putaway?

You can't use a CSV import for bin transfers. I tried and hit that wall pretty quickly. I had to use an Inventory Adjustment transaction, which does let you set inventory detail (bins).