Package is usually Mama Melrose, Hollywood and Vine, and Hollywood Brown Derby.
I read that the 50's PT is substituted only if one of the other 3 is closed (I don't remember where I read that).
We did Hollywood and Vine last year. This year we are trying the Brown Derby. I know many people enjoy Hollywood and Vine - the night we were there it was a zoo (packed with serveral very large parties). I think the large groups resulted in some unusually long buffet lines (they all seemed to always go at one time!). We really wanted a "server" experience this year.
Last April we had reservations at 5:50. This year, all the package meals seem to be between 3 and 4. I will admit that 5:50 cut it close for a 7:30 show (especially with the crowd at the buffet).