The garden from scratch

Bottom right corner of your plan is a teeny weeny N so I took that as North.
Maybe make that area behind the garage a "work" area - Bob's stuff, then the PTs. Probably there'll be electric & water somewhere over there  and use the "private water supply" (is that the ditch?) as a boundary marker.

EDIT - just seen the blue line on the 2nd plan!!

Sorry think I confused you by adding the second plan to a post you already looked at. I put NSEW on that one.
I can’t find the tiny N you’ve been working off    .
 water supply is private and coming from where the 2 red lines run off the plan. Electric is coming from the pole at the back of the house. You can see it’s shadow on the google map image I put up. ( slightly up & right from the house maker )