this is true. I keep an SBR in my go bag which follows me everywhere from vehicle to vehicle. That being said .. I still know that the pistol on my hip is going to be my first option no matter how a supposed scenario starts out. If nothing else it will get me to easy access of my rifle more...
run the gun you carry at all times. I always think what if I have to bail quickly for whatever reason?? At least you know you have you sidearm on you and no longer have to worry about secondary actions of retrieving said "truck gun"