I've found that alfalfa and broccoli sprouts dehydrate quickly in a kitchen food dehydrator, and rehydrate in cold drinking water into a product that actually tastes like the genuine article.

Mixing a good tablespoon of these mummified sprouts into a couple ounces of dry hummus powder has yielded a pretty tasty trail snack on a few occasions.

They're probably not as healthy as eating the freshest ones, but they're a nice way to get some greens in on a long journey without undue weight or bulk.