Here are pictures of 55 gal drum that I have used in winter or windy conditions. On one you can see a bracket I attached and the last one where an umbrella has bee inserted in the bracket.
Happy winter Q'n
http://static.flickr.com/103/284003757_f04d80a542.jpg
http://static.flickr.com/106/284003762_a348449b7a.jpg
http://static.flickr.com/107/284003763_16638ebf8a.jpg
Dan in Wis
Happy winter Q'n
http://static.flickr.com/103/284003757_f04d80a542.jpg
http://static.flickr.com/106/284003762_a348449b7a.jpg
http://static.flickr.com/107/284003763_16638ebf8a.jpg
Dan in Wis