Also, you generally don’t need to get approval of re-use at the time of writing. Generally, it’s enough to get approval in the present day when you are asking to use other people’s works, no time travelling required. So I would argue current you’s approval would be plenty.
My grandma always told of a legendary man in my hometown, who would always take his horse to the local bar in the 1950s. When he got too drunk and fell asleep, the other patrons would carry him outside and sling him sideways over the horse, which would then trot off in to the night, supposedly delivering him safely at home.
I know that’s not very scientific evidence, but I always took it to be true. Maybe someone can concur.