Presbadarious

So, while watching the fireworks from High Bridge, we saw three red lights moving about the sky throughout the evening, one of them moving down the river and over everyone on the bridge before disappearing. Anyone know what these were?

I ruled out a helicopter or airplane, because I saw once of each while I was there. Drones were the only other thing I thought they could be, but do they have bright lights that can easily be seen from a mile away and can they also travel at least that far from the operator or more?