I suppose you could use all that stuff if you wanted, however a hot glue gun is like, 5 bucks.. and super easy to work with. Every cham enthusiast should own a hot glue gun, I use the bejesus outta it!
Hot glue dries fast, makes little projects quick and easy! I have used silicon in other projects, and its not only extremely messy, but needs at least 4-5 days to cure and set, whereas the hot glue needs about 10 seconds.