I bought a Park-it 360, 10,000 lb model with the basic "B" option. I have a 28 ft TT. It didn't work well for me. I used it to pull the trailer into it's final position I my back yard. I used my truck's front witch to pull the trailer through a 24 foot gate making a 90 degree turn. I backed the truck through the gate pulling the trailer in to park the trailer's street side along a 60 foot fence that runs east and west. The property line with the gate runs north and south and is 40 ft long including the gate. The south end of the 40-foot fence connect to the East End of the 60 foot fence making a 91 degree angle. I wanted the trailer door to face the back of the house.
When I got the truck backed in as far as I could go I unhitched and moved the truck. Then I usd the dolly to pull the trailer the rest of the way so that the coupler would be about six feet from the east end of the 60 foot fence.
It didn't go very well because I was pulling across grass and then dirt were a shed used to be located. The trailer tires were sinking about an inch deep into the yard where the grass was. This was causing a lot of resistance and even with two batteries and two full 30 pound propane cylinders on the tongue the wheels on the dolly we're free spinning and not pulling very much. I even stood on top of the dolly to give more weight to the wheels and I'm 320 lb and it didn't do any good.
I had to use the trailer tongue jack to lift the dolly off the ground so that could place a 2 x 10 under it. I also had to get the guy that was cutting my grass and two neighbors to push the trailer while I operated and steered with the dolly to finish moving the trailer into position.
These dollies might work fine on concrete, asphalt and hard pack gravel but they definitely do not work at all pulling across grass or loose dirt.
I hope you have better luck and are not having to pull or push the trailer accross grass and dirt.
I purchased my Park-it 360 through
saferwholesale.com. They also have several other dollies to choose from, however they are more expensive. Some of these have the wheels farther apart which I think would make it more stable and they also use standard drawbars for hitching. The Park-it 360 is a bit complicated because the tow balls for their dolly has a spot welded on it that has to be lined up inside the coupler when hitching then you have to tighten up the piece that holds the ball tight against the bottom of the coupler to lock it into place. This is so the dolly won't fall over sideways while connected to the coupler. This happened when I used the dolly to move a utility trailer and I didn't tghten the collar against the coupler.