There are heaps of items that you can buy to assist with camera support.
One I made up (with the help of my mother in law) when I left the Army, was cutting up the legs
of my Cam Trousers, sewing up one end and having velcro on the other.
When in Fiji I simply bought a bad of dried peas and stuffed then in my "sacK".
When I left I simply donated them to a family.
I found the "sack" extremely usefull for Landscape and the like, if your prepared to get down and dirty.
At home I use rice or peas as it lasts for ages.
You could try your own from an old set of jeans or buy one online from the UK for $50+.....................