I would suggest keeping the AK theme and dining at Animal Kingdom Lodge. Per the official Disney Dining brochure, Rainforest Cafe is not covered by the Dining Plan. We are going in September with Free Dining and will be dining at Jiko on our Animal Kingdom day.
You can take the bus from AK to AKL. It takes 15 minutes. Transportation after dinner gets harder
.its not so easy to get from resort to resort. Usually the best way would be to return to AK and take the bus back to your resort. The AK busses stop running an hour (or 90 min???) after the park closes (which currently is 6 PM on 8/11-19 and 5 PM on 8/20-31 with PM EMH on Wednesdays extending closing to 9 or 8 PM, respectively). You can take a bus to another theme park (thats open) and close to your hotel then take the bus from there to your hotel. As always, if your tired and dont want to drag the family on an hour bus ride, you can have the hotel bell service call you a taxi (Maybe a taxi-van with so many people).
At AKL, there's Boma, which is a buffet and one table service credit. Only open for breakfast and dinner (5-10 PM). Kids under 3 eat free. While there are some exotic and interesting items at Boma there are lots of other 'normal' food. I really enjoyed Boma last September. I always see great reviews for it.
And there's Jiko which is a signature restaurant so it requires 2 dining credits per person. (Without incurring tooo much wrath...some people suggest paying for the kids meals and using their dining credits to supplement your own at signature restaurants. Its your decision to make....). Also has great reviews. Its upscale, so I don't know about coming straight from the parks.... We will be returning to our rooms for a rest, shower, and change before going to dinner.
you can check out the menus and reviews at "allearsnet"
and check out transportation options at "ourlaughingplace"
Have fun!
Rebecca