Update
The truck from Sacramento to SLC with my vehicle has departed (advisor said he didn't show a departure date, which seems odd). Once it arrives in SLC, I'm supposed to receive a call to arrange a delivery day with the 3rd party carrier, and then it's probably another few days to Montana where I am.
I don't have an EDD, which kind of makes sense because the hand-off from Tesla to the 3rd party hasn't happened yet. All things considered, I'm completely OK with this wait, as my initial EDD would've placed me in July. I'm (optimistically?) expecting a Tesla in our garage in about a week and a half from now.
Out of curiosity - does anyone know, or have an idea of how long the truck from Sacramento, or even Fremont typically takes to get to SLC?