Hey Howdy Hey Michael and welcome to planDisney!
Be Our Guest Restaurant is one of my favorite dining locations in Magic Kingdom for so many reasons. The food is really good no matter for lunch or dinner, might I suggest you save room for the Grey Stuff, it's delicious! The atmosphere inside is absolutely amazing and you have the option of sitting in three very different dining halls, I would highly suggest the West Wing for a very cool view of the enchanted rose. Just the fact that you are dining in the Beast's Castle is such a really awesome experience, I cannot wait for you to enjoy a meal in this enchanted castle!
One of the really big benefits you have dining so close to Park close is actually on your way out. Although all lines for attractions will close at closing hours, you may still be able to hear attractions going, but you will not be able to get in lines to experience them. On your way out though, you will be able to casually stroll towards the exit, walking through the park with very few people. I have had the fortune to experience this a couple of times in the past and my goodness, you are able to see so much more, hear the music more clearly and get a ton of very great unique pictures of the park and Cinderella Castle with very few people. It's almost like you have the park to yourself!
The other thing to keep an eye on as the time gets closer to your vacation is the
Park Hours. As of right now, looks like Magic Kingdom closes at 9:00 p.m. on March 2nd, but these are subject to change without notice. You might find yourself with later park closing hours and the ability to get on one more attraction after dinner if they change.
Good luck with your final preparations, we cannot wait to welcome you to the Most Magical Place on Earth!
See ya real soon,
Nick