I try to film my son on the rides while riding (he will ride with dad and I will sit it another car if possible, or I will record the ride). I found a great padded hip pack on ebags. Its a bit large, but it holds my then bigger cybershot and bigger video camera (I have since gone smaller with both after lugging them around WDW), some snacks for our son, his autograph book and pen, small souvenirs (ie pins), my credit card, $, drivers license, room key, etc. Most of the time though I ended up hanging my camera from a lanyard around my neck and carrying my video since it was hard to get to in a hurry. Check out ebags though, they have a ton of styles. Also, bring a ziploc bag for those water rides or rainy days!
alison