I need to say this...only because it's supposed to be done this way.
I realize you want more time on AC... we all do and then take the trip to the mainland for flight.. but.....I watched, recently, people comming into the airport at the (somewhat) last minute and there were a few upset customers because the line was long.
They look through all of your bags that will be in the belly of the airliner.
I was so sick I wanted to die and had time for observation on each side of the scanner.
There were people on standby that got a couple seats belonging to someone else because they were late and let me tell you there were some unhappy (original) seat owners. They did not give them back! The plane was a full flight and that isn't always the case but was this time.
A lot of people living in Belize will go standby so I learned.
I had not seen this in the past since I was up and around like others, looking around, or sitting and reading.
I was too ill to read!!!! Don't let something like being sick be a hold back either. No one plans an illness but you can plan ahead to be at the airport.
I have traveled that country and that airport for many many trips and didn't witness what I did at the airport that day.
So, for encouragement, try to be there the required time as requested by your airlines.
Lots of folks stagger in at the last minute and are upset with the airline gals/guys at the counter. It's not their fault. They're doing their job.
I think klcman was gently mentioning you should be there with time to spare
as am I