From IH 37 take 358 (Padre Island Drive) or from US 181 take 286 (Crosstown Expressway) to 358. Stay on 358 East to Park Road 22 (still called Padre Island Drive.) Take 22 to the Island (Padre Island that is) and continue south until you pass the Padre Island National Seashore welcome sign. The next beach access to the left will lead to the beach. Take a north (left) and drive about a mile and a half. You will see the tents raised and fellowship happening.
Note: If you make it to the entrance to the National Seashore, you have gone too far. Head back north to the above mentioned beach access road.