Depending on what you like to do, there are a ton of options around the Dells.
I personally don't enjoy crowds much, but with that being said I'd highly recommend the Duck Tours & the Tommy Bartlett Ski Show. Those are two pretty iconic attractions in the area.
Aside from that there are some great golf courses in the area, and as you'd expect from Wisconsin there are some really good fishing spots in the area as well.
If you're looking for campgrounds to stay at, there's a pretty good list on Vault Cargo's site here: ***Link Removed***https://vaultcargo.com/wisconsin-dells-camping-guide/