We were planning a trip to Churchill, Hudson Bay, to see polar bears (we've since returned - a superb trip), and the literature recommended a bean bag. I chanced upon this on Ebay: http://www.jessops.com/online.store/categories/products/jessops/the-pod-green-camera-supp... (this is UK but they should be available in US as well); I picked up the Ebay one for 99p + postage. It was invaluable in the Polar Rover in Churchill for photographing the bears better than the ones supplied which were heavy & cumbersome and particularly because it screws into the camera/lens so doesnt fall out of windows. It will certainly go on our next safari.
I thought it might be worth bringing to the attention of UHH members in case theyve not seen them before.