Before the internet, vacation tips were shared via postcard like the one I sent from The Natural Bridge in Slade, Kentucky a few years ago:

The sign said "Family Tour: 1 P.M." Family, my ass! It was an hour and a half straight up or winding around on a narrow trail nestled between poison ivy, stinging nettles and a steep drop off. Our guide was very funny and the view was incredible. If I didn't have to give piggy back rides on the way down and sprained my ankle, I'd totally go again! -Angie

But had I submitted a post card-like entry to Parentography, anyone who logged into the site could find out that the family tours at The Natural Bridge State Park really AREN'T meant for families with children of ANY age, as they could trip and roll down the mountain; the gondola rides at the top have metal lap bars that do NOT seem safe; and holding onto your child's shirt to keep them from slipping and falling the 100 feet straight down to the pine trees will make your arms go numb but since you'll also be clenching your butt in terror, you won't really notice it much.

The site has a clean design and is easy to navigate. A drop down menu allows you to search for (or submit) suggestions on kid service, restaurants, lodgings, activities, parks & playgrounds and major attractions.

Travel plans can definitely be tweaked for the better by looking at the recommended ages for kids, what season the activity/event is suitable for, and probably most important for the parent to know: the time commitment other parents recommend allotting for the activity.

Parentography is still in the beta version and has a few bugs. When I put Michigan in the search engine, nothing came up, but the a sidebox listed Ann Arbor, Michigan as one of the most active communities for reviewers. And as a resource, it's only going to be useful if people register (free!) and start submitting, but I think Parentography has the potential to be the Wikipedia of family vacation planning or even just for pointing out interesting places nearby that you didn't know existed.