Ben, as Cortland said, be careful of where you place a windbreak. If your garden spot is higher than that western line, and the pond site is lower, a hedge between the garden and the lower pond area could trap frost in your garden, giving you an earlier, harder frost. Make sure to leave a way for frost to drain away from your garden if you can. But you are also correct in wanting windbreaks against that strong west wind. Have you considered something less thick, like a narrow band of perennial plants, that can slow the wind and add privacy, but not cause so much frost. For example, here in NW Colorado we also get fierce winds off the nearby desert. When we moved here 7 years ago, the
yard felt like a wind tunnel at times. I planted a small food forest--a couple of young curly willows,
apple trees and plum trees, with a few shrubs like Nanking Cherry, siberian
pea shrub, and low ones like currants. But my best "privacy" hedge is a row of Jerusalem artichokes near the back alley. In the summer, it really makes the yard feel more private, and we noticed this year that the wind is definitely less fierce in our yard.
A sun trap could be as small as one row of trees or shrubs, or could be a band of trees with associated guild plantings, like Nanking cherry, hazels, currants, ground covers, etc, that wraps around a lawn, pasture, or garden area with beds of annual or perennial vegetables, herbs, etc. I found a good book called the Secret Garden of Survival, by Rick Austin--mine is an ebook, but might be in print form too-- that talks about how to combine guilds of plants that work together but make your garden look like an abandoned, overgrown pasture so the "zombie hordes" don't know its there and come steal your food. I don't know that we need to go that far, but he does talk a lot about guilds and how to grow a survival garden for hard times. Gaia's Garden also has a chapter about guilds, and lots of info about various plants and plant functions. I really recommend it, as have others. My copy of the first edition is falling apart, I have read it so much. I gave myself the second edition in Dec. and have already reread it twice ( it is one of the books I have checked out of the library multiple times).
The secret garden talks about laying out swales and terraces for the plantings. Then there is
Mark Shepard, with his Restoration Agriculture, who created a farm of on-contour swales and trees--a permaculture savanna with grazing and crop strips between the tree rows. So there are lots of ideas to investigate. I spend most of my winters reading and watching videos and trying to find ways to adapt various ideas to my high desert landscape. Have fun!
Yes, take plenty of time to observe. Take photos of various parts of your land, different times of day, shadows, etc. Watch where the snow melts first and last, where drifts pile up, etc. Look at your zones--Zone 1, close to the house or to main paths, for the most intensively harvested or most visited crops and structures, and work out from there. Although, if windbreaks are needed, it is good to get them going as soon as possible. Geoff Lawton talked about "controlling the edges," or protecting the edges from invasion, by wind, wildlife, etc.
I recently came across another book, Backyard Winter Gardening, by Caleb Warnock (also and e-book). He does a lot with cold frames and manure-filled hotbeds, for year-round eating. Since reading this book, I have been looking at my yard in a new way, seeing where I might be able to put some frames to provide fresh food in the middle of winter. There is so much to learn that life, gardening, and permaculture, are a life-long adventure.