Packing the rubbermaid or stanley tubs for local diving, I try to pack somewhat according to order I'll need things. The BP/W ends up on top since I set that up on a tank first thing before I start messing with exposure protection. I also tend to store my bp/w inflated somewhat - I can hang the whole thing upside down and this seems to help water drain into the inflator hose where I can empty it out easier. Regs under the BCD since they go on next. Rest of the bucket is exposure protection and accessories (mask/fins/instruments).