Each vehicle (4) and the 5th Wheel RV has an extensive FAK in an USGI M3 bag that a SF Medic turned MD helped me design. Some of the stuff in those is for when a trained responder shows up but has no gear. (Airways, etc.)
Can I ask where you got your supplies? I've only seen one place that sells IV solutions- bpmedicalsupplies.com- (apparently w/o a doc presciption?), and only a few (ie, Gall's) that sells Oropharyngeal airway and endotracheal tubes.
I'd love to toss a few bags of NS into my car kit, and MAYBE a few ET tubes with a laryngoscope. Maybe keep a few in my home FAB too, if only to stop the hangover after a day of wine tasting (ie, getting drunk in public but trying to remain sophisticated).