Seeds are cheap, wasting a month of the growing season while you work out your seeds aren't going to germinate is a waste of anyone's time.
So try a germination test on your seeds after you've dried them out and near the time you'd be doing a seed order anyway. Put a tiny scatter of each one on a (marked) piece of damp kitchen towel. Put all your squares of kitchen towel on a tray lined with some more kitchen towel, then cover with a clear bit of polythene with a couple of holes punched it it. Keep in a corner of the house where it's warm but not too warm and inspect and redampen daily. If a batch of seeds germinates, then you know it's viable. If not chuck the seeds and buy fresh.
Edit: Just read the bit about mould...chuck them. Don't waste your time on them.