Hi Angela!
The Hoop Dee Doo Music Revue is a FANTASTIC dinner show, and will surely keep everyone entertained throughout! Our family recently attended the show (family of 4; 2 children-ages 7 and 3) and I was glad to find both my children totally enjoyed the show!
My son (the 3-year old) was the biggest question mark. I wasn't sure how he would react, since it wasn't Mickey or another fun Disney character. But the stage performers at the show are engaging, active, and incredibly funny, and my son was right there laughing with the rest of us. Daughter too! Definitely encourage you to take everyone to see this, you won't regret it...
As for payment, our family of 4 (2 adults, 2 children) cost about $200. The Dining Plan, spread out across the entire trip, is said to save guests between 20-30%, depending on the plan you chose. So, if you can spare the meal credits, I'd go for paying via the Dining Plan vs. paying out of pocket.
So definitely book this Dinner Show! It'll make you and your family's day :-)