The past couple of times we have gone we have stayed at Country Roads Motorhome & RV park. I see you said 3 teenage boys, this park does however require that those under 18 be accompanied by an adult. We were typically only there to sleep so it made no difference to us. It was quiet, and inexpensive. And just outside all the attractions of town. We have also been to stand rock campground and enjoyed that as well. FYI..Depending on what you are wanting to do at the Dells check out the bundle packages,, it will save you $$ ..we are also a fan of Noahs Ark Water Park. Hope this helps.