My first visit to Thailand I went to Phuket. Was not as beautiful as the photo's I had seen. While it was nice, the gay scene was very limited.
For Pattaya, you simply take a car for about 1200 BHT, stay in Pattaya OR Jomtiem, from cheap to expensive. LOTS of nightlife, and a buys gay beach in Jomtiem. E-mail me if you need hotel information in Pattaya and I can give you options.