We love the HDDR and recommend it.
We went when our children were young, and I was delighted to go with my adult DS as he shared the experience he loved with his 3 and 5 yo's. We have also gone with all adults 30's to 60's and we have had a blast each time we have gone.
The food is good "down home cooking", certainly not gourmet, but good. It includes all you care to eat salad, corn bread, fried chicken, ribs, mashed potatoes, baked beans, corn and strawberry shortcake. The price includes tax, gratuities and beverages, including beer, wine and sangria.
The show is a Western themed show full of singing, dancing, audience participation and corny jokes. It is lively and full of action. We love it and I think your little ones will enjoy it, at their level.
Have Fun