Small network setup in the field.

I want to know if any one else out in IT land has to setup and maintain computers, networks, servers, etc. in the field.
By “in the field” I mean trailers, temporary buildings, vehicles, that kind of thing. It maybe on a jobsite, expedition, military, goverment, research sites, etc.

What do you use to ship or move your equipment, do you use new stuff straight out of the box so you don’t have to pack it or rack mounted shipping crates?

What kind of problems have you had to over come in maintaining your networks and equipment out in the field?

I am trying to find a good rackmount shipping case that isn’t to expensive does any one have one they like?