1-4 would work but what if, for some reason, the mix turns out not be to adequate for the situation. Why not
1a) bounce the tracks as desired then archive all the other tracks and bypass any bus FX Racks (this step may not even be necessary)
2a) forget about bundling instead use "Save As" with "Copy all audio with project" enabled to a folder on the flash drive
3a) copy the folder onto the laptop and verify the project shows up as expected
4a) record pedal steel
This way the entire project will be available on the laptop should you need it
When back at the studio
5a) perform 2a except the source is the laptop
6a) perform 3a except the target is the studio DAW
The entire project is back on the Studio DAW with pedal steel added