Hi scott I aso work for a news station WPXI Pittsburgh.
Your animation looks good. I made a project exactly like this before for a promotions contest.
I can tell that you understand ae pretty well.
Here’s an idea:
make 2 precomps, one with (the perfect wedding type) an a comp with just the invitation and make them 3d layers.
allign the 2 precomps between your 3d envelope layers ( flap inside front and back), then add a null layer with the
3d switch selected. parent all the layers to the null and add a camera. before you animate the null nudge the back
of the envelopes z position so that you see the back side when it flies in. The null does the fly in and all the layers
can still be animated without moving the camera.
I hope this helps.