Welcome to the DIS!!
We stayed at WL last year with our dd who was 10 - she really liked it! We planned our dinner at Whispering Canyon Cafe - she had a lot of fun as the waitress pulled up her father and I and asked everyone to wish us a Happy Anniversary - she felt the food was good (BBQ meat and fries) and it was just a fun happy place.
She loved the pool - it had a small slide... she liked the atmosphere - they have a geyser - and we loved taking the boat from WL to the MK -
We didnt like the long lines for the food court - but the food was fine... it seems everyone wanted to eat, then leave about the same time!! She also didnt like the Cub Den - a babysitting type play area - they have ages 3 or 4 to 12 - but mostly when we were there they were all really little kids, so we didnt use that service.
There is a huge thread for the Wilderness Lodge - but their first page has a lot of information on rooms and location.