I didn't go to Versaille, but I did go to the Louvre on my visit to Paris last September, and it was very crowded, as I presume Versaille will be. I agree with mwh1964 about enjoying the sights instead, buying postcards, or using a pocket camera/iphone ( I used my S90). I know its tempting to try and get awesome shots, but its too crowded to allow for that, so its best to leave the heavy gear behind and enjoy the time with your family
Bonus info: My favorite spot to photograph Paris from above (way above) is from the top of La Tour Montparnasse (Tripods are allowed) Best view of Paris. They have designed the roof top as a platform for viewing Paris 360 degree, with protective glass protecting you from the wind, but with openings just for us photogs
A super quick elevator will take you up. If you've been to the Empire State or Top of the Rock roof tops, its that quick. Make sure to go for the sunset light.
Notre Dame de Paris from la tour Montparnasse:
Eifel tower and Paris from la tour Montparnasse: