The best advice I can give first is to practice your normal precautions when transferring your beer. Rack it "quietly" no splashing. Leave the bubbler and bung in place until everything is ready. The CO2 from fermentation will stay in your fermenter until you move the beer out.
IPAs are one of the beers that should be consumed fresh. They can lose that wonderful bitterness and aroma over a short time. I would try to schedule brewing it close to your friends wedding day. That said you still might want a little extra time in case there is a carbonation problem. It would suck if you pop one at the reception and it is flat because it just needed another week to carb. Kind of a catch 22.
There are also oxygen absorbing caps. I have never tried them but guess they couldn't hurt.