I've had dry fruit last for several years and it tastes fine. It doesn't really go bad so much as gets harder and drier. I think the better alternative to buying dry fruit is to get a dehydrator and do it yourself. When apples and peaches, and what ever kind of fruit goes on sale, dry some and toss it in a jar to mix later. Its almost impossible to screw up dry fruit. Some fruits like apples and bananas need to be first dipped in lemon juice to keep from darkening.

A question to those who's already given this some thought...

Trail mixes of various sorts are a great nutrition item - and also a morale booster; I guess this is not much of a secret...
The unfortunate problem is - at least for those ready packages I was checking at Costco and other retail networks - that their expiry is extremely (and disappointingly) short: only few months on average.
This makes them excellent for short forays into the wilderness - but, alas, not appropriate for long term emergency supplies.

Has anyone here been able to find some that would be good for at least a year?

On a slightly different notion, what about home-dried / dehydrated fruit? How long is their shelf life?

Check Walmart...there own store brand seems to have longer BB dates than Costco. I know there hard candies in their value bags can be good for more than a year.

Costco's nuts for baking...raw nuts...usually have a year and nuts will stay fresh two years from purchase date, in the deep freeze. You could feasibly make your own mixes and vacuum pack them with a Food Saver and date the BB to whatever you use in the mix that has the shortest BB date.