I have a basshound10.2 and I have the fish finder mounted up at the bow. Have the transducer mounted to the trolling motor. I bought it used and the original owner had the transducer mounted on the rear of the boat and the fish finder in the middle of the seats. I use my TM at the bow so I never really could see the FF with it being mounted there.
I second the tailgate down suggestion. As far as launches go, I found it easiest to have a rope on the front of the boat, push it off the trailer and beach it or dock it while you pull your trailer out. Loading is the reverse when I'm alone. If I have a buddy, I throw him the rope and have him pull me up. I don't go to many busy boat ramps so this application wouldn't work everywhere. having an outboard on the back would make loading/unloading much easier, it's on my list of to-do's.