If you are going on vacation soon please don't join Development games. I don't have any maps that I am working on right now where people are on vacation, but I know that other people are. It just seems to be a little rude. I don't mean this in a way to deter people from joining the dev games, but if you know that you are going on vacation in a week, let the developer know that you would be happy to join a game after you get back. It seems the right thing to do. Avoiding this will allow the development games to move along a little quicker.
And for those of you who are on vacation I'm not calling you out, this is just something I noticed. I understand that some games you'll join with the intent of finishing them before you leave on vacation and then other people won't join so you wait forever before the game even begins, so I'm not talking to you out there who have done this.