A thin-walled chile like the habanero, or the bananas and cayennes, will freeze pretty well, so long as you're not expecting a crisp texture afterward.
Roasted chiles will also freeze well, as a fair amount of the water leaves, and, well, you've already dropped the crispy requirement.
The cayennes should dry well: crumbled or ground they're useful in a lot of places.
What is patriotism, but the love of good things we ate in our childhood?
-- Lin Yutang