Stayed at Holiday Shores last summer. I'll just describe what I remember about our experience so you can get an idea. We have AT&T phones and got poor reception at the campground (our site was by the river). I would not recommend the sites near the river as we barely were able to back our 35 foot fifth wheel into the spot. There was a retaining wall on the opposite side of where we were backing into so it was a challenge. When we finally got into the spot, the nearby campers were clapping for our success! At the time of our stay, June 2011, there was not internet available at the campsites but it was available at the office. There is an outdoor, and indoor seating area to eat, or use the internet. The office serves also as a mini-store, and bakery. They have extremely good doughnuts that one puts an order in for the night before you want them. In the morning you simply stop by to pick up your fresh made-to-order doughnuts. They were extremely yummy.
We don't have children, but this campground seems well suited for them. If you visit their website you'll see the swimming beach and pool.
I think I would have remembered if cable tv was available. I believe it was not an option.
Would we go back to Holiday Shores Campground? Yes... however, we would camp at the sites farthest away from the river. There are larger pull-throughs that are available away from the river with plenty of room for larger rigs. I would never camp anywhere else at this park despite what the park people may tell you. When we made our reservation for a river site, we were assured that there would be plenty of room for our camper... and we barely got in. Also, if you're near the river, everybody thinks your campsite is a path to access the river. We had a relatively constant flow of unsolicited visitors passing through our campsite.
There is more activity at this park than I've ever seen at another with the seasonal customers. Everybody seems to have a golf cart and likes to whizz around the campground at top speed... many of whom had alcoholic beverages in their hands.
There are two ways to enter this park. 1. A long driveway on a narrow road. 2. a quick-access gate to the upper campground (containing the drive-through sites). I think one can make arrangements to initially get into the park by the gate option to more easily access the pull-through sites. It would be a considerably shorter route. Be advised the the upper sites are a considerable distance from the swimming beach (possibly a quarter of a mile, and maybe a block or two from the swimming pool).
Feel free to ask if you have more specific questions. Also... if you have time on your Dells trip... make your way to the Circus World Museum in Baraboo, WI. Website:
http://circusworld.wisconsinhistory.org/ It was a surprisingly fun and memorable attraction on our trip.