David,
bending and grinding is usually the answer - as well as multiple different wrenches; stubbies, offset, etc.
I also have this half moon wrench in my tool box; have used it for most of my tough to reach areas. No doubt, patience and very small turns of the nuts is the main theme of these hard to reach areas
https://shop.snapon.com/product/Half...-Wrench/CX1820
Have fun! Jeff