I had 2 parents suffering from dementia (one Alzheimer's and the other vascular-related) at the same time. My father was ambulatory at first and then his legs didn't work anymore. He didn't want to wander but once he lost his ability to walk, he often said how he wanted to walk outside. My mother would sneak out a lot, usually i found her at the end of the driveway but sometimes she would make it to the end of the street. Luckily, I had kind and understanding neighbors.