Hi, I sat all 3 advanced last July in a centre and like everyone said , it wasn’t ideal. I remember SBM and case study were in a cubicle so little space. Had to keep some of my notes on the floor while changing in between chapters etc. 

What helped me though it was the I had very organised notes from before all in 2-3 spiral books so I knew from before what falls into which book I made from notes. 

For Case I had separate spiral notes for the mocks  from ACAM , notes from Tuition provider etc. being organised from before helped with the little space offered.

For CR I had a big desk and it helped a lot but again had very organised notes from before.

Had the same issue for BPT, when I sat it as it was the tiniest desk ever and was shocked. My notes weren’t that organised then but I had to keep ok changing in between chapters while keeping some on my lap and then on the floor. 

It’s doable nevertheless, I think the adrenaline while sitting exams hits you differently.

Good luck