Brining before dehydrating?
Brining is a process that hydrates...or forces liquid into the cell structure of the product...to slow or prevent dehydration. This would certainly slow your dehydration step, perhaps dramatically. Adding extra water and then eliminating as much as possible doesn't seem to make sense. Why not just dehydrate less in the first place?

Basing my thinking on the quick method for rehydrating dried beans, I would suggest using boiling water...or stock (maybe hard to come by on the trail)...to speed rehydration.