Are you searching for retreat locales? There is a great site that I often mention to my consulting clients for surveying the extent and types of agriculture in various regions. It is available from Purdue University’s horticulture department. 
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I was doing a web search and I found this interesting video on British SAS operations , available for free download. It shows the planning and execution of a 28 day Observation Post (OP) mission. I was surprised to see how much detail they included about their weapons and field gear (“kit”), organization, and tactics. There are definitely some useful tidbits–particularly about tactical field discipline and how they pack their Bergen rucksacks–that preppers will find useful.
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