Tripods are great. Many ppl buy them so they can get in the picture, sure. But also, for low light (i.e. long shutter speeds), long teles, or high macro magnification, they can help eliminate shake. Or if you have video capability, they can eliminate the “Blair Witch” look.
But it’s problematic. It sounds like you want to use long, heavy lenses, and a grippy pod may not support that. A lot of traditional tripods have weight ratings as well. They get bigger, heavier, and more expensive pretty quickly and they’re not as friendly to lug around.
Another thing to consider is getting a “quick release” tripod. Illustrated:
http://pana3ccduser.com/images/upload/501_quick_release.JPG
The idea is that without one, it takes time to thread the screw securely into the mount of the camera. If you’re taking one photo with the camera on the tripod, then two off the tripod, then another one on the tripod, all that threading/unthreading would drive you crazy.
The quick release plate stays attached, so you remove/reattach the whole plate quickly and securely.
Pros shooting sports with long lenses sometimes opt for a monopod instead.
Old trick 1: You can brace yourself against walls, poles, etc. also. Not perfect but if you don’t have any equipment to help you…
Old trick 2: Sometimes you want to photograph a still life (like the flower pic I posted) in low light and/or at high magnification. If you have a cable release, that’s great because you don’t have to touch the camera and possibly shake it. But if you don’t have one, use the self-timer and the camera will trip itself.