They will go through periods of cheeping and resting. Anytime I get worried that they've been quiet too long I play this:Sorry for the frantics! I am a worry wort meddler too and being away for a day and a half really put me into high anxiety mode! Within about 10 minutes of adding my water and getting the humidity up we have a small external pip!!!! I don't think it has broken the membrane yet. I just heard another small faint peep out of it. Should the peeping be pretty continuous, or do they quiet down for period of time?

It's a great motivator! When they start to actually zip I actually keep playing this video and they zip out in 15-20 minutes. If I play this and don't see the chick respond I get a "closer look" (in other words I meddle and open the bator to check on the chick...lol).
Congrats on the pipper. That's excellent.