Imo
This was likely criminal related travel
Rentals for that amount of time aren’t cheap, something had to fund the trip and the vehicles and whatever else - that’s a lot of travel time to be holding a job
I think it’s possible that When the parents were apprehended for the activity, there was no child but in the investigation, there were phone videos and photos through March and then they stopped.
It’s possible the identities aren’t being released because they are being used in a bigger investigation.
I also think they may have said the child died but cannot remember what state they left her in or they just aren’t speaking