Another nice item from that
link:
If you are shopping for a domestic airline ticket you should know that airlines tend to start releasing cheaper seats about 3 to 4 month before departure (this is when airlines begin to actively manage revenue for the cheapest of their 10 price points for seats on most flights) – and yes that is when you should start shopping, about 3 1/2 months before departure — any earlier and you’re probably paying too much.
No benefit in being the early bird.
Reserve that log bed or tent and wait a bit for the flight.