This does not sound to me like SA, one night of destruction and a hyper dog in the morning does not equal SA in my experience. What it does sound like is she's a dog that really likes routine and that was broken by her suddenly being outside.
You say she is smart, as most GSD and GSD mixes are. Smart dogs are usually harder to train and deal with. A night of destruction means she was stressed and looking for a stress outlet, which is why she chewed your hammock. It gave her something to do with her time and energy.
Take all things from your porch and yard that she may chew. Try easing her into the ouside role by crating her outside as she had been in the house. It will be more familiar to her. Crate will keep her calm as she adjusts to being on her own outside.
As far as her being hyper, thats another sign of the stress she was under. Training her to be calm will help, if she knows basic obedience try using that to redirect her energy into something you can live with. Ask her to "down" for several minutes before you touch her, reinforce her calm demeanor and don't allow the excited freak out you've seen. If you show her to down until she relaxes you will just make her de-stress before you interact. If you give her attention during the time she is so excited you will be reinforcing that state of mind and she'll not learn to settle.
Teaching a long down-stay would be very helpful to you both.
Good luck.