You Brits need to remember many Americans have this perculier notion we are a combination of John Wayne and Rambo. We can go off into the "wilderness" and live off the land should some thing go wrong.
Please don't attempt to dissuade us by pointing out there ain't much wilderness around where we generally live and, if "it" hits the fan, a lot more people will be heading for the woods at the same time.
Please, don't try to rain on our parade. Lack of training, experiance or location will have little effect on the romance of survival.

"There is nothing so frightening as ignorance in action."