Trying to salvage my backyard
I live in WA state where it rains nine months out of the year. My home has a backyard that is covered by four trees. Very little light makes it through. On top of that the trees are cedar and they drop leaves that are very acidic. One of the four trees is on my property, the other three are in my neighbor's property, right at the border. I've tried reasoning with my neighbor to allow me to prune the trees to allow light to come through, reduce the amount of leaves/branches falling, and give me a fighting chance to salvage my backyard. In short, they won't.
I can use your help with ideas on how to transform my backyard to a usable, fun, and appealing place in spite of my neighbor's trees.