SRW will give lots of clearance for that other trailer that you are worried about being too close to. As long as the pin box touches the angle of the hitch you are good to go. Chock between the wheels especially on the side that is close. If you leave the other side clear the trailer will shift away from the close one. Might help a bit to put a bit of grease on the hitch ramps. If you need more than a couple of inches you can always deflate truck tires a bit for a bit more. If the pin box will hit the angle of the hitch, line everything up, move ahead five or six inches and then back in one shot. Don't try to ease into the pin, it won't break or bend. More than five inches all bets are off.
Art.