We too have a "tight fit" getting our two trailers onto our 21' wide by 24' long slab of of a very narrow alley.
We use these
Hydraulic Wheel Dollies and a lawn tractor to get the job done. The lawn tractor has a much tighter turning radius and the wheel dollies allow us to straighten them out and nudge them into place...with room to spare for working on them. We also have wheels for the tongues for moving around to get them away from the fence/garage to get inside if the doors are on those sides - normally, we park them with the doors to the center so we can get into either anytime...but below is when they were pushed to the edges to make the center work area as large as possible... each is only about 9-12" from the edges in this picture.
As long as your slab is flat...they work great!
Shari
