I very recently acquired a P3 pack from Photobackpacker. At the same time, I ordered two MF/SLR enclosures (one for RB67, one for 35mm/DSLR). The pack has ample capacity and appears to have high build quality. As a veteran (but not recent) backpacker, I can say that the suspension system is astonishingly good, and following the instructions to get a perfect fit was not terribly difficult. It fits me like a glove. The pack also fits the enclosure like a glove, of course, and each enclosure each arrived with more than enough partitioning materials to get the job done. Carrying the RB with 90mm and 180mm lenses, Luna-Pro, three backs, two viewfinders, shade, filters, tripod and the usual small items is a walk in the park compared with carrying the tripod on one shoulder and everything else in a shoulder bag. Alternatives to the enclosure kits are available. The downside is that Photobackpacker will soon close its doors, so time is of the essence. On the other hand, prices are ridiculously low. Like RR, I have no connection with Photobackpacker other than my status as a very happy customer. - ceeras