I visited Madison Arm as a quick stopping point/overnight on a longer road trip in late September. There were hardly any people there as it was their last week of operation for the season.
The office closes at 5 but I called at 5:50 when I arrived and someone quickly came to get me checked in. When I was looking on the website, some sites were reservable while others were first come, first serve. I don’t know if that was because of the day of the week or because they were so close to closing, either way I figured they wouldn’t be too full.
There are two tent sections; one by the lake and the other is way out of the way, far from the bathrooms. My spot was beautiful.
My only complaint, so to speak, was the showers. They only had curtains for privacy, no doors. Again, there was hardly anyone there when I visited so it wasn’t an issue, but that’s something I find important.