Thats exactly why I always spend the 1st night in a hotel very near Suvarnabhumi which offers free transport to and from the airport. U just go to the area on Arrivals Level 2 between gates 3 and 4 and ask for the transport for your hotel. Totally stress free, wait a short while and about 10 mins drive to your hotel. I can recommend B.S Residence or Thong Ta Resort or The Great Residence. All on Agoda.com.