Can a person catching a flight come a day or 2 earlier and stay in the Airport till their flight leaves?

It is a.very small airport, I doubt they would allow you to sit and or sleep there for overnight. You cannot check into your flight until 24 hours before your flight leaves. There is only a small lobby before TSA. You could stay at a nearby hotel that has a free shuttle.

Good question I really don't no

Don't think so TSA dosent open until 3pm every day