Although of course there weren’t 50 states with such diverse sizes in 1776, and no Monroe Doctrine. Louisiana was French, Florida belonged to the Spanish, as did California, Texas and New Mexico. Alaska belonged to the Russians, bits of the Pacific NW still belonged to the British. Most of the fly-over states (your ‘hinterland’) still belonged to native Americans and you had yet to colonise Hawaii.
Furthermore, word of mouth travelled as fast as Paul Revere and tarmac and the railways hadn’t yet been invented.
I really doubt your founding fathers really had all that in mind when they developed the EC.
Even if he meant the founders of the electoral college system then that was in 1804 when CA, TX, FL and that weren't in the Union. CA 1846, TX1836, FL 1821 (when they bought it).
Neither 1776 nor 1804 did the US have a hinterland.