304 Ah??? Wow. What does your typical day look like? Do you really need 100 mi between charges?
Looking at past builds in the archives I never saw too much of a concern over vibration. I don’t think it will be an issue.
Heat won’t be an issue either. I think typical use will be barely taxing the batteries.
You may run into issues with the onboard charging system tho. Not so much with the charger, but rather the onboard BMS controls the charger.
This popped up just last week-