Groomer,
Wow where do I start... I have alot more experiance with the Lake Delton area than I care to addmitt. Your camping idea is ok, as this will let you do more parks than staying in the hotel at a particular park. Mt Olympus is where we always stayed so for lodging I cann't help you on that. The Mt Olympus park is the 2nd biggest, and the biggest is just south down the street south on the East side. I can not recall the name...Pick one one day and the other the next. Lots in both. The "origianal" Wis ducks also has a zip line for adults and kids. Very fun, 6 lines, toatling about a mile of length. But be prepared for $100 per head with any souvies involved, $80 without.
Skip the upside down white house, wast of money...Ripplies believe it or not up town is fun for the kids and family if you haven't been to one. Save if for a rainy day..
Prices are high, so be prepared to dive into your wallet a bit. There is a super Wall mart and several groccery stores if you wish to save by preparing your own meals. All the national restarant chains are there as well as some very talented local cheif's & resturants if you like higher end dining. Home made candy shops around every corner too! Spend some time walking the main drag at night and be surprised at what you might see....
Beautifull State park campground NW of L. Delton, don't know what hook up they have, just drove through it once..
Ask me any thing and I will try and helpout...
Regards, Kirk