I'm very new to wild camping in Ireland so don't mind noob questions.

We're (2 people) looking to camp in Wicklow mountains for 2 nights, mid August. For now my spot of choice is Lough Dan. Here's what I'm looking to find out:
What's the best/safest place to park, how busy is it during the week, is it hard to access (because of the private properties) and also would you recommend it and if not could you recommend some other nice and secluded spot?
Thanks. 😊