keeping pregnancy a secret?

Christa.
Anyone else plan/have kept their pregnancy a secret? We suffered a miscarriage at about 9 weeks with our first and I plan to keep it a secret until I'm showing (actually hoping to wait until I'm like 5-6 months). What are your tips for keeping it quiet? I won't have to worry about alcohol as I don't drink around our families often. I'm also not tiny (not huge either, just average). Any other tips?