Hey there Cody,
What a fun evening you have planned at the
Hoop-Dee-Doo Musical Revue! You are absolutely welcome to
park your vehicle at the lot across Seven Seas Lagoon from Magic Kingdom Park on the evening of your dinner show reservation. In fact, you may park there for free if you are a registered Guest at a Walt Disney World Resort hotel. When you pull up to the booth where Cast Members collect parking fees, they will not ask whether or not you have a ticket to the theme parks so it will not be a problem that you have no plans to enter Magic Kingdom Park that evening.
Once you park your car, board a monorail or ferryboat over to Magic Kingdom Park. In front of the park, you can board a separate boat headed to
Disney's Fort Wilderness Resort. Upon your arrival there, you are just a short walk from Pioneer Hall. That is the home of the Hoop-Dee-Doo Musical Revue.
I'll give you another parking option just in case you find it preferable. With a reservation to dine at the Hoop-Dee-Doo Musical Revue, you may park near the entrance of Disney's Fort Wilderness Resort. Then board an internal resort bus to Pioneer Hall. It's a bit more direct than the earlier option I described, but I certainly understand the allure of starting your evening with views of Magic Kingdom Park.
Whichever parking option you choose, have a wonderful evening and please enjoy some fried chicken and strawberry shortcake for me!
Sending best wishes and pixie dust,
Jill