I know someone who had to make a glider outlanding in a more than hilly zone (southern alps). He touched down in a very small meadow and ended purposefully in an apple-tree orchard. Aimed between to trees. Both him and his passenger came out of the wreck with nothing but bruises on the shoulders (straps tightened before landing).
This worked fine with a wooden glider. Don't know what that would have been in a glass or carbon one. Glass exhibits some plastic deformation before breaking, whereas carbon is very brittle and does not dissipate that much energy. Metallic structures would probably behave better.
Nevertheless, I guess it is still better to aim between trees than towards one
