Hello, there are no public transport to take up there. It’s a tiny dirt road... Even on bikes, it’s hard to pass one another if you meet a local going the opposite direction at certain parts of the trail. I’d recommend a taxi to get as close as possible then hike the remainder of the way. The path is easy to follow, it’s just small and muddy during rainy -- which is about August. But it’s a tossup, since waters are nicer during rainy season too.

I know this is 4 months late, but yes, you can swim there. It's not as crowded as well, so a nice place to enjoy a hot day.