I and my partner are also ex Muggles, and are just getting into it, but so far no luck in finding any, but fear they have been moved, binned or discarded by unknowers, as it's a very busy town with lot's of Chav's floating about. And so looked for 2 and found 0 I am using a HTC WF with GCeo software (free app) MAYBE I'm looking far too hard.
Shame the caches themselves dont have transmitters, as anyone can just pick up and toss away a cache.
But I feel a new hobby coming on. Just need to learn the ropes.