Our family had a recent reunion at the Merry Mac resort/campground--what a terrible disappointment. We stayed in the "cottages" which in reality, are trailer homes. My family shared the largest cottage which upon arriving appeared to be a renovated 60's or 70's era trailer with an addition built on. The beds were atrocious and thin mattresses wrapped in plastic were reminiscent of sleeping in a baby crib. It took me three days before I gathered the courage to sit on the living room furniture. The small/inadequate bathroom struggled to service our ten guests. It was particularly unattractive and unappealing to be welcomed into the "cottage/trailer home" with an automated air freshener that was perhaps installed to mask the smell of mold. Moister absorbing containers were hidden throughout. The other two cottages that we rented were of no better quality. Stay away from these cottages unless you enjoy sleeping with spiders and the smell of mildew.
There were many people at the "resort" that seemed to be enjoying themselves. However, these appeared to be people that had brought their own campers. The owners of the resort appear to be making a gallant effort, but have forgotten to take care of the people that are paying a premium price for the cottages. We had a great time in the Dells--in spite of our accommodations.