TIGHT

"Aye, ye can get a jeep through fine"

Aye Right!

I think my car is a littel wider than the average farm or work site pick up

It took about three minutes each way; mirrors  folded in and R my colleague guiding me forward inch at a time while constantly checking each side. If the car rose over a bump it had the effect of tilting it over. Several pinch points with bulging stone reduced clearance to about half an inch.
If we have to come back I will park on the road side and carry the gear up the hill track. It would only add an hour morning and night.