You must make sure that everything goes perfect in one trip, and then everything goes wrong in the next consecutive trip.
If you feel like you are frustrated from near-misses. You can always modify your save with notepad, it's clear to read and easy to cheat!
You need to first:
1) Stop on the way to piss
2) NOT Get lost on the way to the lake
3) Swim in the lake
4) NOT Get lost on the way to the camp
5) light up the campfire successfully
Then peek and see that the trip was successfully satisfying
Then, do another trip, in it:
1) You need to NOT stop for a piss
2) DO Get lost on the way to the lake
3) NOT swim
4) DO Get lost on the way to the camp
5) NOT light up the campfire
Then peek and see that the trip was very unsatisfying
And there you go!