Wow! Thimbleberries. That is another I had not heard of.
As for boysenberries, I am excited just anticipating planting them. It is nostalgic for me. My grandfather used to grow tons of them, along with many other things from his amazing intensively cultivate 1/3 acre garden. Grandma would can them and make all kinds of wonderful desserts with them. If you were to mix blackberries with raspberries and stir thoroughly, that is pretty much suggestive of the flavor. They are wonderful, but you never see them fresh in stores, because they don't keep well enough to ship. They do, however, freeze just fine, which is how I plan to keep them.

@MikeInBatonRouge - Blackberries have the nostalgic connection with my grandparents. They had 24 acres southwest of Akron, Ohio. Blackberries grew wild on their property and surrounding areas. When the blackberries were ripe, my grandfather would outfit us kids with rubber boots to cover out long pants and with long sleeve shirts. He insisted we wear a hat too. Then he would lead us through a rather swampy area some of it thick with maple and oak trees. The area we trekked to was along the backside of a drive-in movie theater and the whole parking area was bordered with blackberries. We pick berries and each about as many as we collected (at least us kids did). What we brought back, my grandma would either bake into a pie, or she would cook it into a syrup we poured ovèr ice cream.

My grandparents also had a row of raspberries, but for some reason, he kept mowing the over with his brush hog. Grandma would get so mad at him.

Another year, we discovered elderberries growing wild in the back of their property. They were as tasty as the blackberries in a pie and ice cream syrup.

@RussRAB oh yeah, raspberries! My mom used to grow those. Mom and Dad sold our house when I was eight. The people who bought it from us chopped down the fantastically productive pear tree and turned the raspberry patch into a dog run. What is WRONG with people?!?

I grew up in Olympia, WA and attended high school on the Kitsap Penninsula across the water from Seattle. Blackberries were abundant. Fond childhood memories picking them for cobbler. Mmm

@MissKathleen vacant lots are especialy great places for blackberries to take over, anywhere not shaded by trees. What surprises me about these dewberry vines is that they are under oak trees. But they "dew" manage to get a few hours of sun a day.

Thanks! Helpful idea. I am thinking some simple T stakes and either baling wire or chicken wire mesh. I do already have some chain link fencing that some of the plants will be close enough to be trained to.

@MikeInBatonRouge They climb barber wire fences, so baling wire at 12 in intervals should more than suffice. I would allow 2-4 feet of wild on each side for maximum growth. adequate water supply during the growing season will give you the most lucious fruit.