I don't know how my dad did it. He put 5 kids in a mid 60's station wagon, hooked up an 18-foot travel trailer that my mother loaded with everything but the kitchen sink and without TPMS or GPS headed over the Rocky Mountains. I'm pretty sure the Pontiac tires had 32 PSI and whatever the sidewall said on the trailer tires.
Two weeks later we'd be home planning the next trip
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