About post offices, 1 possibilities exist (like "Canada Post").
For supermarkets you have 2 locations.
For schools you have 2 places with "Keyano College Fort Chipewyan Campus", "Athabasca Delta Community School" for example.
In term of gas stations you can find 1 places (like "Gas bar").
Are you looking for an apartment for sale/rent? Or interested by a house? You can check that on Realtor.ca.