We have the Parkit360 Force 10K and use it to pull the hitch end of our LE2 into a corner. A front receiver would be no help since we pull the hitch to within about 6 feet from a wall. Speaking of the hitch, the Bulldog doesn't work well with the dolly without the EZ Connect Hitch Adapter. The manufacturer says their dolly doesn't work with the Bulldog hitch, but this guide was published before they made the adapter: Your Guide to Different Hitch Styles: Choosing the Perfect Trailer Dol – Parkit360
The dolly has enough power and grip on pavement to easily move the trailer, but it probably wouldn't work well on gravel. Sometimes the wheels slip on smooth level pavement, usually when pushing the trailer wheels over irregularities like the driveway apron.