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I highly recommend maxing your 401k, especially in your situation. You should have no reason as to why you are not.
As to the wedding, I personally don't care for large, extravagant weddings. I married very young, at 18, was divorced at 21. While I am not by any means saying yours will not last, I will say it is wise to not go full bore on a wedding. What I would suggest is have family bring food and alcohol to the wedding, and have it in a beautiful nature reserve. It means more to have food cooked by your family, kind of like a gigantic get together and celebration, than some faceless caterer serving food that you have no idea as to who cooked it. Weddings are supposed to be a familial celebration, not a lavish display of extravagance.