When I saw the picture above I thought Idaho for some reason. Then saw your license plate. Looks like your making quick progress. If you need a hand on your trailer let me know, I'm in Ada county also.
I don't know enough to comment on shortening your trailer. I just chimed in because I too am doing my first offroad trailer and having a blast with it.
Good to see someone else just jump in to it and do it. Good luck and keep us updated.