As others have said, you can walk right in, but I'd STRONGLY advise using a pair of "water shoes" (sold under different names). They're fairly inexpensive, & well worth it. We snorkeled Princess Cay on our first cruise, & it was beautiful. But, at least where our chairs were, to get out into the open water you had to walk from the beach across some rocks in the shallow water. We did it, but it was rough on the feet. Also, don't forget the sea urchins you come across in the Caribbean! Again, on our first cruise, after snorkeling on another day, walking back onto the beach barefoot, my wife stepped on an urchin in very shallow water, and suffered for days. We used the "shoes" on our second cruise, and had no worries. Oh, yeah...did I mention our 3rd cruise is on October 22nd?!! It's so close, we're ready to count the hours, not the days! We're going on the Grand Princess for the first time.