An UPDATE: Thanks for all your tips. I got a good spot in between A-stage and B-stage and it was awesome 🙂 .
About the bathroom, I knew I would have to go and when the time came I did basically as you suggested, I squeezed my way back through people, some were a bit annoyed but in the end I got back to my spot.
Cheers and thanks again for helping me out, it was a wonderful night 🙂 .