The CAT schedule lists 217 and 303 as busses to Belz Factory Outlet. Looks as though the 217 runs from Las Vegas Blvd.(strip). There's the possibility that you may have to transfer from the 217 to 303 to arrive at Belz.
Yes it's the 303 you need to connect with at Vacation Village. I know because I got on the 303 one time by mistake instead of the 301 (brain fart). The busses still stop and operate out of vacation village, and there appeared to be some sort of security there as well, now that the casino has shut down.