First off....

Let me say that I am a VERY proud parent and
father of a Junior Girls Scout (troop #1764) in the Kentuckiana Council. I have actually been the one that has been very active in DD's Girl Scout activities. The other mothers in the troop and I have become really good friends and I take all the girls to all kinds of places all the time. We have the exact same thing in our council area. A sleepover at the Louisville Museum of History and Science. However, I would never stay overnight at this function because of the impression some parents may have concerning a male sleeping in the same unrestricted vicinity of their daughter. I really missed that part of the trip but I understood and left for the night. No one asked me to, I just did. Most of the other troop leaders from the other troops know me and were OK with it but I just wouldn't like making another parent feel uneasy. Heck, we took a troop trip to Indianapolis to go to the Indy Zoo and the Indy Children's museum and I stayed with the girls (just our troop) and other troop mothers in the same room one of the nights doing girl things for a sleepover. One of the mothers said that if I weren't married she would think I was homosexual.

I like to cook, I can decorate, I don't drink beer or watch sports and I am VERY active in my daughters life. Most guys here are under the impression that if you don't do those things above, then you're not a real man. Maybe I am not their idea of a real man, but I love my daughter with all my heart and I will always be her idea of a real father.
Well, back to the question. I do think that it may be seen as inappropriate by other parents and just to keep things civil, just don't stay overnight.