Do You Think Renewing Your Vows Is Crazy?

Me and my husband got married at 19 at the courthouse, and it was not anything big or fancy so i missed out on the whole wedding dress and fun things. Well next year in October will be our 4 year anniversary and I wss thinking about planning an extravagant beautiful wedding to renew our vows and have a church wedding and just have fun, and get to have pictures and stuff. Does this sound good and do alot of people do this. Will it not be the same since we are really already married? Any ideas or comments?