Hi Kerri,
Thanks so much for visiting the Disney Parks Moms Panel with your question!
It sounds to me like you want to visit Magic Kingdom one day, and on that day you will go to The Pirates League, eat dinner at Be Our Guest Restaurant, and stay for Mickey's Not-So-Scary Halloween Party. I do not think that is too much for one day. My daughter recently went to The Pirate's League and loved becoming an empress. You will need to eat dinner, so why not head to Be Our Guest Restaurant? Then capping off the evening at Mickey's Not-So-Scary Halloween Party will be fun! The one issue I can think of is that this might be a very long day for your little one. Perhaps you could start the day a little later, say around early afternoon at The Pirates League, so that you can relax in the morning. Alternately, if you have two adults in your party, perhaps one of you could head back to your resort for a midday rest with the little one.
As to
Akershus Royal Banquet Hall or
Cinderella's Royal Table, that is really a tough question! I have dined at and really enjoyed both. If someone told me I could only choose one to go to, I would choose Cinderella's Royal Table. There is just something magical about dining in Cinderella Castle in Magic Kingdom. That said, if you cannot get a reservation there, Akershus Royal Banquet Hall is also quite nice.
I hope that these thoughts are helpful for you, Kerri. Have a great time planning your vacation, and please do not hesitate to ask if you have any further questions.