I'm absolutely horrible at avoiding spoilers so I usually play as soon as the episode comes out. However, I usually play with my siblings, and my sister's away at college. She gave me and my brother permission to play episode 4 without her and episode 3 came out right before she went away.
She's coming home on Saturday, but she still needs to play episode 4. I have work that day and my brother also has obligations, and she hates playing alone. That means that we'll probably play episode 4 on Sunday, and maybe episode 5 on Monday if I have time (also working on those two days but for fewer/more reasonable hours). I have no idea if I'll be able to avoid spoilers that long because I have incredibly low self-restraint in terms of spoilers (I was always one of those people who read the last page of a book first. ...Yeah.)
/cue tearing out of hair and overdramatic anguished screaming
This is the first time where I hope that my prediction is wrong and the game comes out next week, not on Tuesday.