R.M.
Bolts on the doors so she can't go outside sound like a good idea ! I know I used to sleepwalk & outgrew it without major incident, although parents did a lot of instructing about waking myself up.
My son had night terrors around that age for a good couple of years. He'd appear at my side of the bed trembling from head to toe, walking him back to bed really didn't work ~ counted no less than 8 times one night & I had to get up & go to work in the morning! eeehh.... It was simpler for me to let him crawl in beside me & go right back to sleep. Woke one morning to find him curled up asleep with his blanket halfway downstairs on the landing. The whole thing finally just resolved itself & we'd wake to find him in his own bed.
Nowdays we have Bach Rescue Remedy ~ if he's had a difficult day or anticipating one a few drops under his tongue at bed time, he says helps him sleep better.
A couple of years ago I searched out night terrors & tho some of the info is the usual repeated material, I did find a few more innovative approaches.