I have been in this situation. Years ago we were at the local gun range and someone had their face to close to the scope when they pulled the trigger, the scope hit him right between the eyes. The wound was deep enough to need stitching. There were about a dozen people there including a medical doctor and I was the only one with a first aid kit. Which wasn't much more than a boo boo kit. After stopping the bleeding and a cursory exam the Dr sent him to the ER to get cleaned up and stitched up. With close and readily available medical care on a non life threatening issue it wasn't a problem. But it is eye opening that no one else had anything with them. So even if you don't have have the training it isn't a bad idea to have the tools available just in case.