Maybe it’s cheating, but I tried to throw in some things to suggest possible prequel material. So odd to imagine a story backwards! I kept imagining the rest of the trip instead of what happened before.

Nah, that’s not cheating. It’s all good. It’s fun to see if your hints are used, used in a way you didn’t anticipate, or ignored.

Awesome, spreading grandma’s ashes. Never would have seen that coming. But, that’s the joy of prequels.
LoA

WTG with this prequel.. the possiblities of the5v places grandma would want her ashes spread.. the imagination could go anywhere..
LoA

The trick is going to be exploiting those places within the rules :-O. I will be an intriguing challenge to make use of this information working only backwards!