Your property looks a lot like mine, actually. We have a lot of funky looking maples, trees growing sideways, etc. I would be curious to see how moist your soil is and how close to the surface the bedrock is. The funky-looking trees combined with alders looks like the wetlands around around my place, and from the land surveys I read that my property has a hardpan pretty close to the surface, causing the
water to not drain, and the
roots perhaps not to go too deep. Maybe that's why the trees look like that? Has the land been evaluated for wetlands yet? If not, you might want to as there's not much you can legally do on protected wetlands (make some paths, watch some birds). Protected wetlands make great
Permaculture zone 5s, and are great for wildcrafting and maybe sneaking in some
native edibles (thimbleberry, elderberry, wood strawberry, bunchberry, serviceberry, lingonberry, red and mountain huckleberries, oregon grape, salal, wild roses, miner's lettuce, oxalis, black cap raspberry, salmonberry, trailing blackberry, etc.), but if too much of the property is wetland, you might not be able to put in a septic, or build a house, etc.
I do think it's pretty exciting, though, that you have trees old
enough to be dying in your forest--that indicates to me that it's a more mature forest, with good fungal diversity in the soils. But, I'm no expert.
As for edibles growing on such a property, well, I don't know if it's any indication, but my fruit trees and berries do well for me, but I have a hard time growing most annuals except for daikons. But, that could also be my own lack of expertise....
Some resources to look into, if you haven't already:
* Liquefaction Susceptibility Map for your county (here's an example of one, this is for Snohomish County in Washington:
ftp://ww4.dnr.wa.gov/geology/pubs/ofr04-20/ofr2004-20_sheet61_snohomish_liq.pdf). This will tell you how prone your land is to landslides or to wiggling like crazy in an earthquake.
* Web Soil Survey (
https://websoilsurvey.nrcs.usda.gov/app/HomePage.htm). This will tell you what general types of soil you have. (loam, silt, clay, etc).
* Topo Map (
http://www.digital-topo-maps.com). This will give you a general idea of streams and depressions, which might indicate wetlands.
Also, I saw this article the other day:
http://www.seattletimes.com/seattle-news/politics/home-building-halted-as-counties-react-to-water-rights-case/. Apparently, a current court ruling has stopped all new well-drilling in our state! Hopefully it will get overruled soon, but until then it's put a damper on most rural home construction unless one wants to use rain water for everything.
I hope that helps!