Here is a soft sandbag with a handle that lets you perform all kinds of workouts with your legs and hands. The ALLN-1 F2 Olympic Sandbags are available in 5lbs to 20lbs sizes. Simply bring your sand, and you are ready to go. These ship with ankle straps and a poster, so you will know how to use them.
These sandbags are great for cross training and conditioning. You can find out more about them here.