At just over 2,500 feet, it's the highest point on the TMT. In spring, look for red currant blooming here. From Tom's Crossing, the West Tiger #2 Trail heads steeply uphill providing another way to reach that summit. Continue down the TMT on many switchbacks and, in about 0.3 mile, note the junction with the K3 Trail.
I rarely show up more than 1.5 ahead of time. Another idea: technically, the ticket counters usually open 24 hrs before your flight, and sometimes this is the only way to easily get special seats like exit rows.
Should this not be a possibility for you, an excellent method for allowing yourself a bit more pre-airport time, is to dress smart. Wearing loafers or moccasins and cutting down on jewelry and bulky, layered clothing can skim your security time, perhaps cutting back on your need to show up quite so early.