I recall pondering the Raid Z when it was made but never took the plunge. The infinite customizability seemed clever. (Has there even been a brand killed off as cruely as Dana Designs?) The ULA Epic is essentially the same concept, and I'd consider something like it were I to ever, say, do a soggy tundra trek. Or Scotland. I've been able to handle consecutive wet days with standard gear; apart from what's already been discussed is the importance of a tarp for cooking, gear storage, hanging out and packing. A little tent is a poor substitute.

Cheers,