Hanlans is awesome!!! Have been going for many years for a bit of an escape.
It is divided into more or less three sections for the clothing optional section, which is about 500m.
The north boundary nearest the lifeguard station is mostly clothed groups or couples, some single, having fun and just chillin, some straight, some gay or lesbian.
As you move south towards the middle section it gets more liberal, much less clothing and more nude. More of a party vibe. Still couples, some singles and some groups.
As you pass the tree line on the southern side, near the flag pole, you get into the really crazy party section, mostly gay. Loud music, mostly clothed and mostly gay. It was insane on Sunday there were at least 2,000 people there with full DJ booth set-up.
I prefer the middle section and tend to walk the entire length during the day when I am not tanning (fully naked)
Bring food and drinks, the food selection is sparse at Mermaids Cafe, which is licensed. Most people bring their own booze and food. There are washrooms by the cafe but most people pee in the trees east of the beach. You can also meet women on the beach, which is great, they have an open attitude to nudity which is refreshing.
If you go just expecting to have fun and to relax you will be happy and also meet some great people.
Have fun!!!