I'm delighted to see SBTR made it in - many thanks! I had an (unintended) break from flying, so only noticed it recently.
I'm enjoying OLC CanAk, and have a few suggestions for there before the USA floodgates open:
CYRL - Red Lake. The Norseman Capital of the World, with an annual fly-in. The airfield is a little north of town, and there's a water aerodrome right next to town.
CYGL - La Grande Riviere. Near a major hydro project, it's an excellent jumping-off point for visiting Hudson's Bay and the Canadian Arctic.
CYDM - Ross River. At the start of the northern Canol road, a gorgeous VFR route through the mountains. Just north of the SAK region.
PAKN - King Salmon. A gateway to Katmai NP, and a useful site for travelling down the Aleutians.
And one more in South America:
SCTE - Puerto Montt. Situated between two of Chile's most scenic regions - the Lake District to the north, and the Fjords to the south. Volcanoes round about too.