Tripod Sand Bags/Weight Bags

If my tripod carries a maximum load of 33 Pounds,what maximum load of Tripod Sand Bag/Weight Bag should I get?For your information,the load that I shall be using with my tripod is a Canon 1D MKIV camera and a Canon 70-200 F2.8L MKII lens.
Thanks.

It is a lot easier to just hang your camera bag on the hook. It will lower the CG a tremendous amount and stabilize it nicely.

(Max load) - (Weight of Camera+Lens) = max dead weight

But I agree with Joe...why carry around a lot of dead weight that otherwise serves no purpose but increase your burden?!
The better way, than to have a heavy weight swinging in the air, destabilizing the tripod more, is to put the bag on the ground and stretch a bungie cord between the bag and the tripod...all downforce, no swinging weight.

Don't try to actually hang the weights from the tripod. Instead use a bungee cord and place your backpack beneath trhe tripod, then attach the bungee to the backpack.

It is steadier that way.