Just returned from a 2 night stay at the wilderness with our kids ages 5 and 2. Read a few of the pretty scathing reviews and thought I'd share my perspective.
First off, we stayed Thurs and Fri over spring break week, so I fully expected the place to be packed. I can also appreciate that during peak season the rates are going to be much higher than if we had picked some random week. I,e just because the room was $289 a night (including waterpark entry), I didn't expect a 4 or 5 star hotel. Additionally, in chosing a place dubbed as "the largest indoor waterpark in north america" I didn't expect to roll out of bed and into a pool. I also didn't really expect utter peace and quiet throughout the evening, full well knowing the place would be loaded with kids. Lastly, we're talking "The Dells". Yeah, we'd all rather be on a beach for Spring Break but we only had 2 nights and weren't going to fly anywhere for a few days.
With those expectations as my barometer, I was pleasantly surprised.
First off, you can stay at the wilderness hotel or glacier canyon. We stayed at Glacier Canyon, which I recommmend. I'm putting this review under The Wilderness, because Glacier Canyon is a Wilderness Resort property and most people search Wilderness even on the web when booking a room in Glacier Canyon. We stayed in a studio two double beds, pull out sofa, microwave and econo refridge, flat screen and dvd player. The room was newer, decorated in the typical "outdoor" knotty pine theme. Room was clean, as was the bath. Only complaint was that the room didn't cool down in teh evening. It was still 30 degrees outside in the evening and the room wouldn't go below 72. We were on the 5th floor, so I ended up cracking the slider 1/2 an inch one night because it got so hot. (at least to me, my kids slept like rocks) Overall room was clean and "updated" for a budget/modest hotel so I was happy.
When I checked in at Glacier, there was a line about 8 deep, however they did have at least 6 people working check in and it took 10 minutes max. The guy that checked us in was very pleasant and efficient. I didn't experience issues as other note, but again, this was at Glacier Canyon part of the Wilderness.
Waterparks. Ok, they are a hike. There are 4 main parks and the closest is probably a 8 minute walk with the furthest being 15 minute walk. I expected this and don't mind getting the exercise so to us this wasn't a big deal. If there's any complaints, when you get into the Widlerness part of the hotel corridor, its pretty narrow and can be a pain passing others in the halls. Optionally, you can drive to the parks or take a hotel shuttle. We took a shuttle back the one evening and waited just 5 minutes for it.
The parks were very crowded but actually not as bad as I expected for spring break week. The furnish towels (like locker room quality), but they had plenty of them and getting fesh ones were never an issue. We did have to wait, but never longer than 10-15 minutes to find chairs to put our stuff. Was easy to take breaks from playing with the kids to sit and watch them do their thing.
They have 2 different wave pools and a ton of water slides for kids/adults of all ages. There were plenty of life guards on duty and they seemed to be attentive. One actually dove in the water at one of the wave pools to help a boy that was having difficulty and they stopped the waves immediately. They have a decent mix of attractions for younger and older. Our 2 and 5 year old would play in the kids area for awhile, then join us down the larger tube slides and had a blast the entire time. They even allowed kids in the hot tub, which they loved as well.
Food was as expected. Overall pretty lousy, but we only ate lunch there. Fast food (deep fried) typical fare with expected inflated prices. We ordered pizza delivery one night from Sarento's and it was decent enough.
I would not particularily recommend this place (or others in the dells for that matter) to couples or people without kids. If you have kids and are looking for a few night getaway with non stop action for the kids, then I'd give the wilderness (glacier canyon) a shot.