This is what I use on all my hay that is stored outside. My customers love it because its weather tight (except for golf ball size hail). It's not the fastest or the least expensive but it works for me and my customers. We wrap dry, wet, round or square bales with it. http://www.anderson-machineries.com/English/enr_ind_rond.htm

In the future we will be purchasing an inline for faster results. http://www.stingerltd.com/products/wrapper/wrapper_specs.htm