is the back area currently unobstucted, no trees or anything have to be cut?

for me id just drive the thing down car first one day and see if could turn it around. if not worst case scenario you unhitch the trailer down there and spin it with a pair of car dollys under the supports, or something of that nature. or back it all the way out again

no matter how you calculate it out on paper, one day you will have to just try it anyway, might as well go for it and let the chips fall where they may

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