People often ask what they should wear to a photo shoot. Without meeting you first, it’s really hard to know. Your style is entirely personal and what you’re comfortable in is really important. With that said, I can can give you suggestions for what colors work well together and what sorts things really stand out in a photo.
Things to consider are:
Neckline (what looks best on you in real life will obviously look best on you in a photo)
Fit- big relaxed shirts might feel nice but watch out for the “dumpy” look. If a little bulge ends up popping up in a photo you can either love it or have me fix it in Photoshop but it’s best to avoid hiding completely.
Kids should wear well fitting and washed clothing too (crease marks from the store really stand out)
Don’t go overboard with matching. This just may be my personal preference, but I’d say some variation makes for a nice casual and spontaneous look.
If you like color, go for it. Accessories can add a little dash or you can be brave and wear stripes and plaid together. You can pick 3 colors and have everyone wear two of them or pick 2 colors and have a third be an accessory that half the group wears. Layer up, we can decide at the last minute what looks best.
Check out these links to get some more suggestions - http://www.antsmagazine.com/photography-2/50-outstantding-examples-of-family-photographs/, http://ayphotodesign.com/2010/09/03/what-to-wear-family-portraits-color/