A few days ago I ordered this Manfrotto gizmo, its called a “Super Clamp”. Aside from the clamp itself, there are several accessory adapters for it. Below is the clamp, a 1/4 and 3/8 thread short fixture, and a 3/8 thread tripod head mount, with the 3 head securing set screws.
Here is the clamp with a Silk SBH-100 light duty ball head, using the 1/4 and 3/8 thread short fixture. This would be for maximum portability, and smaller P&S cameras. Or mounting remote slave, and off camera TTL cord sync flash units.
Here is the clamp setup for more serious business, with a Manfrotto MA460MG 3D head, and the 3/8 thread tripod head mount.
All these fittings snap into a quick release socket in the clamp, so you can change them in a flash. The smaller thumb screw in the rear, locks in the device to secure it, so it does not accidentally get released. The large lock lever secures the clamp, with just a little snug turn. The small silver button on the clamp body, is the device quick release.
The clamp will support 15Kg, and clamp on up to a 2-1/2 inch pipe, or 2 inch flat surface like a table or shelf. Hey!, even a tree limb of the proper dimensions would work. Actually the clamp will fasten to almost anything from 1/4 inch thick up to 2-1/2 inches. Round, square, triangular, or flat.
So if you want something super portable, so you can have some camera support when needed. You might think about one of these, I am glad I did. But I never knew they existed until I saw one on the internet, just a few days before I ordered it.
Sold by B&H, the clamp is around $24, the fittings are extra.