Like Tom stated, either site can be dived or snorkeled. We dive em both often, so keep an eye out on the Trips subforum ontop this forum. The Whiskey is a really great dive at the moment, its more uncovered than its been in the last 20 years from what I understand. Lots of little swim thrus through the ribs and some of the deck plating. Ballast stones are visible on alot of the wreck and even the bow side of the ship is starting to become uncovered. The main bulk of whats uncovered stretches ~100' so its hard to miss using Tom's directions.
The ALabama Point jetties are alot of fun. You can snorkel the outside of the West jetties pretty much any time, its shallow, and if you stick away from the point, you won't have to contend with the currents. The inside makes for a great dive, but you will need to dive during the tides or plan on drifting one way or the other without being able to swim back to your entry point.