@JaxBchKay- I am going to be using a photobooth at my reception. I will let you know how it turns out ( my wedding is in two months) I have been to a few friends weddings where they had a photobooth and it was one of the best things I've seen at weddings. I told my fiance whatever the cost we had to have one. For me it was important. They give you a copy of every photo from the booth as well as give one to the guests to take home. So you don't really need a guest book because the worker will put the photo in a book and let the guests sign it. Also they have a video recording the entire time in the booth ( guests don't realize this) and you get a copy of hte DVD to see some funny moments. We are only doing it for 2 hours to keep costs down but I think that is plenty of time.
As for the chairs. I am having mine moved from the ceremony to the reception since the chair sashes will still be on it,etc. I think there is a charge ( $2/chair) to move but it's better than renting two sets of chairs! That would get expensive. Again I can let you know after my wedding how that works as well.