Robe, shorts, etc., as you have to wear something to the AN beach from room, or elsewhere, on the resort. Once there you may find your lounger before disrobing, but it's not something you want to hesitate doing, as those on the AN beach are there to be naked...clothing is not optional. It's easy, liberating, and natural; not to mention, fun. Get there early enough to have a choice of location, as there are some sea grape trees that provide some shade, if needed. When it's time to get in the Sea you can either walk right in with no lounger pad/'floatie',or carry it by your side (as some do), to shield yourself from the textile beach immediately on your right, or the beach 'next door'. The CN AN beach is on the left side of the property, as you face the Sea, and borders on the next resort area. No Big Deal. ENJOY!
Having been first timers ourselves just last week, (already seems like longer...) the wife and I followed the suggestions of others on this forum:
1. Dressed to the A/N area, once there, find a couple loungers and shed the clothes
2. Relax and enjoy yourselves!
We went to CTI, so getting the A/N area was different than the other Couples resorts, as we had to take a boat to and from the Isle, but the general idea is the same...