Albertson's/Osco sells a generic 'Sav-on' 3 pack of 4 oz Non-Preserved Saline Solution. It's in a squeeze bottle that can generate a pretty good stream and is leak-proof until the cap is screwed down. I don't carry that in my vest but in the first aid kit in the vehicle and is good for irrigating eyes or lacerations.
One of my setters was prone to exertional hypoglycemia so I do carry Insta-Glucose Gel (brand name) in a 1 oz squeeze tube. It can be slowly squeezed into the mouth of the dog even if unconscious and will be absorbed through the mucosa of the mouth.
Don't forget both the home and cell phone #s on all the dog collars.
Have a great, and safe, season!