Running the incest patch, I had the same problem of not being able to progress past the camping event. However, using the walkthrough from the OP, I ran into several other issues.
For one, Katie was trying to blackmail me after fucking the chick in the bar, despite not being on the warpath with Katie and taking all the good options up to this point.
The MC was released from prison without being beat up but I was not able to get points with the mom in the bathroom, a kissing option was not available.
There's also a weird bug when you try to open the door at the first night at the parents house, it leads into tons of errors and the option below leads to some sort of flashback scene with absolutely nonsensical dialogue.
So I tried the patch from the OP again and this time I was able to move into chapter 6. There's a couple of mixups going on in the story though. If I remember correctly, the MC tells the girls that he was released from prison after 1,5 years, thanks to good behaviour. When you met your mom and tell her about the past years, he is saying 2 years and 4 months again.
He also has a pretty massive beard, when in the previous datenight with Leia he was clean shaven.