Hi Brittany!
Thank you for bringing your question to the Disney Parks Moms Panel!
My husband and I did the
Keys to the Kingdom tour at Magic Kingdom Park a few years ago and loved it! As Disney enthusiasts, we really enjoyed getting a glimpse "behind the curtain" at one of our favorite places on earth.
My advice for you is to use Uber to get from your resort to
Magic Kingdom Park. Depending on what time Magic Kingdom opens that day, the buses could technically work, but I would want to make sure I got there in plenty of time. I suggest having your Uber driver drop you off in front of
Disney's Contemporary Resort and then using the sidewalk from that hotel into the Magic Kingdom. I believe it's faster than taking the monorail from the Transportation and Ticket Center and will also have a shorter line at the bag check location.
You can also use a taxi to do the exact same thing. Normally, Uber is a little less expensive than a taxi cab. If you need help securing a taxi, a Cast Member at your resort can assist you.
I hope this helps. Please let me know if you have any other questions and I hope you love the tour!
~Lori