Going beyond the probability of each event happening, the gun which we carry should be the last tool in our tool box. At any event where we have to go and we can't carry, there are many things we can do to lessen the likelyhood of being caught in a life threatening situation in the rare event it takes place at the same time we happen to be without a gun. Our minds and situational awareness should be the first. Placing ourselves in the best possible spot for quick exit but good oberservation of the event, entrances, exits and such is likely going to be better than having a gun on you. If it is a large event with lots of people, the likelyhood of being in a place that you could successfully use a gun without injury to innocent people is pretty slim as well.
To place one's ability to carry a gun above family in certain situations is just wrong in my view. I certainly won't skip being at my parents bedside when they are dying because the hospital is posted. I certainly don't skip my son's school activities because schools are off limits.
If folks aren't willing to assume some risk to themselves for others benefit I can't see calling them patriots. After all, all former and current members of the military have/are assuming risk to protect the rest of the country. Think about it.