I wouldn't recommend that. I tried doing the same thing with my previously scheduled date on the 27th. I even sent the SCR office an urgent letter by mail asking for an earlier oath date because of work travel for May 1st, with proof attached (letter from company, tickets, etc), and my request was still denied for urgent processing. They usually recommend you ask the judge during your time with them on your ceremony day and present your situation, but the judge may accept or reject your plea and you may have to wait for your certificate. Plus, even if you're granted the certificate or e-cert, the passport office will need a few days to process a first time passport. Renewals are quicker to process on an urgent basis but first time applicants take a while. I would suggest you either move your travel date until you receive all your documents, or reschedule your oath ceremony until after your trip.