just a tip..when you go get a cake..are booking the hall and renting the tuxes...say its for something besides a wedding..because as shani said if they hear/smell wedding in teh air teh prices go wayyyyyyy up. get an estimate on everything first THEN you can breathe the 'W' word
and if yoru writing your own vows...make sure you give yourself enough time to do them properly.
good luck