I have used a Power Caster for a number of years, and it has worked reliably with no problems. Our trailer is stored in an enclosed garage with only a foot or so on either side of the door opening. The Power Caster has removed all the stress of putting the trailer into the garage. The trailer is moved at a good speed - fast enough to make progress, but slow enough to maintain control.
One major consideration is whether or not you'll have the 120 VAC where you want to use it - if not then a 12 VDC model would be better.
The trailer is wide enough that I can't see down the side while operating the Power Caster - so I use another person to spot and give me directions. I could do the job alone, but it would be a lot more 'stop and look' to make sure of the clearances on each side.
The Power Caster can be used either with the normal trailer tongue jack, or with a special bracket that attaches to one side of the A frame. Either way works fine, but there are extra jacking steps required if I use the tongue jack - I started out using a jack stand in conjunction with the tongue jack to position the Power Caster, and then switched to the special fitting.
Other considerations are paved vs. nonpaved surface, level vs sloped terrain,, how tight is the turning radius you are planning, and the size and weight of the unit you select (if you will be taking it with you on trips). The Power Caster can be outfitted with a switch to activate the trailer brakes, but I've never needed to use this feature.
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