Acid is an intence trip, it can last anywhere from 5-9 hours. The first 3 hours are like an intense mush trip, the next 3-4 you're at the peak of your trip and just right fucked up, the last 3-4 is like another mush trip fading out on ya though, smoking grass while doing acid will kick you in the ass. I wouldnt do it, I dont think you should either.

PS : I stopped doing acid due to the fact that I herd every time you take it , it burns a whole in your brain and my life is more important to me.

Acids easy to conseal, if you dont want you rents to know then just keep it with you at all times or find a nice tiny spot in your room to put it away, some where your parents wouldnt dare go.