I have a Parkit360. Reasonably slow and noisy but does the job. Worst part is that it has to work over a combination of grass and paving (flat otherwise) with a hump at the change over point due to having to be a water barrier in the Wet Season. Our van is in the back yard and not accessible from our front, but as our son lives next door backing on to our yard from another street we go through there. Due to a house extension for him the turns are now too tight for using the car at the rear for manoeuvring. It does tend to tear up a bit of the grass though on turning and having a dual axle van obviously makes it worse.
The standard Parkit normally uses a generic tow ball system to connect on to and doesn't work with a rotating off road style hitch. Their modification has a bracket that attaches to the "A" frame with a tube through it and in to the top of the Parkit. There has been only one spot on the "A" frame to bolt the bracket on and due to the position of the onboard battery for the Parkit you have to severely raise the front of the van for clearance of the battery. Normally it comes with a battery box but this made the clearance required impossible so as I had a 100Ah AGM doing nothing I've placed it on its side and it is workable. The main cause of the clearance issue is the toe cutter plate on the underneath of the "A" frame behind the hitch. There is provision to connect the Parkit to the Anderson on the van and feed from the van batteries but I won't even try that until I've upgraded the size of the cabling from the Anderson to the inside of the van.
I'm about to bring the van back in to our yard and one of many jobs to do is to see about cutting the bracket and the inner tube down, add some more welds and see about bolting on a section of it to that toe cutter plate under the hitch. This would move the pivot point forwards to where there won't be any issue of clearance and the front of the van can be lower while moving it and a lot less strain on the bracket. As it is I can see the flexing on the bracket and tube because of the height that I have to use it at.