Graceland is easy to book while you are in Memphis. We arrived late afternoon and booked then for the following day. I think it was Grayline- but the hotel can sort it easily. We went in October too. You can do a tour of Elvis' Memphis in the am and then Graceland pm. Great trip and it turned my OH into an Elvis fanatic!
We booked that holiday with Travelbag as it was the best deal at the time but ask for quotes from a few places.

Number one rated hotel on Beale St is the Hampton Inn and Suites,good prices and great value. Also take a look at Holiday Inn Select or the Peabody Hotel (somewhat pricier) if you can get package that would include any of these you would be fine.
One thing you won't have difficulty finding in Memphis is tours relating to Elvis or music- it's the home of the Blues (WCHandy ).
Beale St is of course touristy now,but good to stroll around.
Cute place to go is to the Peabody Hotel at 11am daily for the Parade of the Ducks...