Howdy folks, this is my first post here. The reason I'm posting here and not in the "Introductions" forum is because I wanted to get some ideas on some related problems I have.
I've been interested for awhile now in travel and wildlife photography. I like to travel reasonably light to begin with, but I find that my hands are quite jittery even using the relatively minuscule 70-200/4 IS lens (currently my "long" lens). Furthermore, I found myself getting quite tired on a recent dolphin watching cruise. I had the camera up to my face for quite a while, because it was hard to anticipate when a dolphin might surface or jump. For a few years I've been waiting for the unicorn lens : Canon's 100-400 II. Now as I contemplate its purchase, I'm getting worried because the lens is over twice the weight of my 70-200.
I figure that the solution is likely some combination of technique, practice, and gear. However, I'm not sure where to begin. Sometimes when I realize that I'm tense and getting shaky, I can try to regulate my breathing and help reduce it, but it never goes away. I'm considering changing to a photo backpack because my shoulder bag got rather painful on some of our longer excursions, esp. when there's hiking involved. Hanging the lens from the backpack straps may help manage the weight when I'm not shooting, but that doesn't help when I am. Of course monopods and tripods can be an option at times, but that affects the whole "traveling light" goal while being less practical for certain situations (engine vibration and pitching deck on a marine mammal watching cruise for example).
In short, I'm looking for any sort of tips or advice that may help. I'm guessing a lot of people make it work without being musclebound superheroes, so my slim build is hopefully not the (only) problem here. When you're handholding with a tele or supertele, how do YOU manage the weight both when actively shooting and when waiting around for the perfect shot? If you used to have a much shakier grip while shooting, what helped you improve that? Thanks!
P.S. I'm shooting with a 70D, recently upgraded from a Rebel. I stayed with crop for reach, for budget, and for its relatively lightweight build.