Thanks guys - it wasn't specific to cycling but the phrase "an hour from help" sounds like a good one. I can't see it happening on the sort of rides I lead but that would cover everything I hope.
Plus, it gives you a good get out clause as used by a friend of mine when a little old lady was taken unwell in a local pub. Of the four of us, three were first aiders, so the Wilderness-trained one said "If one of you wants to drag her to where she's over an hour from help, then I'll do something, but until then, I'm finishing my beer."
I don't know precisely what the wilderness course covers, having not done it myself, but it's more for when you're at the bottom of a gorge with no mobile reception and you need to keep someone alive whilst someone else does the trek back to civilisation. Like I say, the full four-day course has covered everything I've needed, from
Agriculture to
Zoos, including office and road, sedentary and sports. I'd suggest doing the standard course first, and then the wilderness training as an add-on after if you still feel unsatisfied (I'm not sure if you need to be a qualified first aider before you go on one of those courses anyway, since that's the case with defib training).