Deer haven't touched mine, but they eat the bushes at my dads each winter. Mine are more in the open, and I cover them with mesh when they start producing berries each year and take it off before winter. That mesh might deter them enough during summer and fall, that they don't mess with them in the winter. The deer ruin everything else in my yard and garden, so it's nice to have the berries deer-free.
My soil isn't he best for BB, so my plants are small (3-4' max). I drove t-posts around the row, every 10 or 20', forming a rectangle boundary about 6' wide, and the length of the row. I leave them in year round. I string light rope from post to post, at the very top of each. Then I drape the light weight mesh across the rope and posts. I buy the 14' wide x 50 or 100' length. I use wooden close pins to keep the mesh on. Easy on, easy off. I remove the mesh and rope early winter, and add it back on when the berries start to ripen in the summer.
