Yeah, any kind of brace or support will help. A tripod or monopod, a finn stick, a modified rifle stock, a face shield, even just leaning your shoulder against a tree.
As a photographer, I find that a lot of my wobbling is in my legs. Anytime I can sit or kneel, or lean on something solid, I get better shots. Directly bracing the camera is of course best of all, but not always possible. For tough shots, I'll consciously relax, take the best stance I can, and quiet my breathing so my shoulders don't move.
A very portable idea is to tie about five feet of string to your binocs, with a small weight (e.g., a bolt or nut) tied to the other end. Drop the weighted end, then step on the weight, and your binocs are now tethered to the ground. By maintaining a steady upward push with your arms, you should find that small unsteadiness in your arms doesn't result in any movement of the glass.