I've stayed at the Polynesian & Wilderness Lodge.
The Polynesian in my opinion has some of the best fruit and overall food and fruity drinks (that can be served with and without alcohol). I believe they still have a nightly luau.
I agree the Wilderness Lodge seemed to have small/crammed rooms. But at the same time , my father is almost always looking for the cheapest deal so they may have better rooms and ours was a result of dad's cheapness. We ate breakfast there a few times and I really loved how it all came out on a skillet with separate "fixins." They have (or atleast used to) their own version of Old Faithful that goes off every hour too by the pool area.
I've been three times. I've had a blast all three times. I would recommend going in the winter months though if you can. The lines tend to be shorter then and the heat and humidity are not as bad to walk around or stand in the lines. Have lots of fun