I can vaguely recall a particular picture book from my childhood – I was born in 63 and remember ‘reading’ this as a young child. It was the story of a family on a woodland hike. The youngest in the family was a curious little boy (might’ve been a girl!) who loved to notice every plant and rock, each lichen and creature that marked the family’s path. As you might expect, the rest of the family was often frustrated at having to wait for their youngest member; they were ready to get to their destination and he was holding up their progress! Soon the family realized that they were lost in the woods and with little recollection of how to get home. The boy, however, showed them the way out. He remembered things like the shape of the last tree and the color of the boulder a little way back. He could point out where he’d seen a certain flower or noticed tracks in the mud. Soon the whole family found their way home.
Could it be “Tommy’s Camping Adventure”, by Gladys Saxon and illustrated by Mel Crawford?
http://www.vintagechildrensbooksmykidloves.com/2013/09/tommys-camping-adventure.html
It’s one of my most beloved childhood books.