Day 1 - Fly in, check into CBR.
Hang out at the pool. Bus hop over to Wilderness Lodge, then Ft. Wilderness. Take the kiddos on a Pony Ride.
Go to Mickeys BBQ for dinner (or keep your Whispering Canyon, as it's a quick bus back to Wilderness Lodge).
Day 2 - Magic Kingdom
QS credit for Be Our Guest.
Do the base package of BBB before dinner.
Dinner at Cindy's Royal Table. Yes, this will eat up one of your Table Service credits, but with two 8 year olds, it's well worth it for a one time experience. It's pretty easy to swap out a meal later (I'll get into that on the last day) with an affordable "family snack" meal or you can use snack credits for a small lunch.
Day 3 - Epcot
Lunch at Garden Grill. Coral Reef is fun, but not nearly what it used to be. Feel free to swap both or either out. Garden Grill is a TS restaurant, rotates and has characters.
Dinner someplace at EPCOT World Showcase (for two 8 year olds, I'd suggest the Fish and Chips spot in UK).
Day 4 - Hollywood Studios
Lunch at Scifi Dine In. You three can easily fit into a single car, based on your descriptions, and they'll enjoy it. This is a TS credit.
Dinner at wherever, but I recommend the ABC Commissary.
Watch Fantasmic
Day 5 - Animal Kingdom
Breakfast at Tusker House before rope drop (official park opening). This is a TS credit.
This will allow you to hit the Safari right afterwards. The animals are more active in the morning hours, and you'll beat most of the lines (and not need to use a fastpass+ for it).
Lunch at Restaurantosaurus.
Dinner OOP (out of pocket), probably at the resort, is what I'd recommend. Spend the evening chilling at the hotel pool, etc.
Day 6 - Day Off
Go to a water park or DisneyQuest. This will save your ticket for the last day (upcoming).
Day 7 - Free Choice
Plan as you see fit.
Day 8 - Free Choice
Plan as you see fit.
Day 9 - Magic Kingdom / Fly Out
Check your bags at the resort (or just check them in with Bell Services) and check out.
Breakfast at Crystal Palace before Rope Drop.
For "lunch" do two meals. One a sweet and savoury one at Sleepy Hallow around 11a, then around 2:30 p go snag a spot in Frontierland and pick up two Turkey Legs and some drinks and chips.
Then watch the 3p parade before heading back to CBR to catch DME back to MCO.