As of early December it was open. I don’t know since then.

Yes.

Very easy little climb up the cliffs. Going there is not a problem, but if you leave it when it’s dark it’s a little dangerous. Make sure you have a flashlight available.

If by "time" you mean time of day I recommend early in the morning. That way you can pick out a spot you like! We would usually arrive about 10AM and hang until sunset. That being said if you arrive in the afternoon the beach is usually busy and full of people. Therefore, you can pick out a spot by people you think might be fun and interesting. If you mean time of year I suggest January/February since the sand is cooler and the whales swim very close to shore. The beach is very nice this time of year!!

Depends on what time you'd like to be there. We found people are usually staking out their territory around 10-ish. And many have umbrellas - a good choice for the "parts" you don't want sunburned. Bring a picnic lunch and just enjoy yourself!

Sundays at sunset. A little bit like Mardi Gras in the sand. Be sure to take care not to leave anything of value on your beach towel. (The party can get quite raucous). Having a small flashlight (or your mobile phone flashlight if you have one) to get back down to Big Beach via the lava tube/path is a great idea.

Yes I am sure he will know little beach but it is also part of Makena State Park

It depends on what time of day you want to visit. If you are visiting during daylight hours, then park in the first parking lot to Big Beach. That parking lot closes at 7:45 p.m. If you are interested in the nightlife that goes on at Little Beach, then do not park in the Big Beach parking lots! Park on the street, take your flashlight, and find a trail to little beach. There are tons of people that do this, so you won't get lost...just follow someone else.

oh yeah - Rent a car or find a friend with one. It's a good ride from Kahului to Kihei and then you have to get to Wailea. From there you head south down the coast a good distance and turn off on dirt roads - No Public Transport unless you have bags of gold for a taxi and then the wait. If you have time and the inclination - rent .... but remember that beauty is in the eyes of the beholder and it's a long way for little return unless you like big butts and birthday suits ! Me ? I'd go to Lahaina instead. Just sayin