Nothing happened, the whole affair was nicknamed "Buchanan's Blunder" and the troops were recalled once the Civil War started, having to sell all their supplies and equipment for pennies on the dollar. Clearly not much has changed in the ensuing 150 years in the way of government prudence and planning.
We visited the small museum, an inn across the street for stagecoach travelers, a cemetery, and (not connected with Camp Floyd, but still very cool) a one-room schoolhouse from 1898.
The cemetery is fascinating because a local historian recently discovered that the gravestones are for people who died elsewhere, and the remains that they discovered through ground-penetrating radar don't match up with the headstone location. So last year they took out all the incorrect headstones and put new ones that all say "unknown" over the remains. When we were there, you could see marks in the grass from the old headstones, in orderly rows, evenly spaced. Today the new headstones are higgledy-piggledy, but accurately placed. Fascinating stuff! Sadly, the wind was blowing fast and cold by this time, so the kids only made it outside for a minute or two before the rain began. We ate our picnic lunch in the car and the kids all laughingly agreed with the quote from an unknown soldier who said "This is the most despicable place on earth."