i would go to a shop that does lifted pickup trucks .
they may have a shackle kit or a blocking system to space your axle a couple of inches more .
with the available space between your axle and the trailer you also would be able to upgrade from a 14 inch wheel to a 15 inch wheel or a 16 inch wheel .
i did something similar to my boat trailer .
my komfort 21T already came outfitted from the factory for additional ground clearance to all of the other trailers that i considered .
komfort is made in oregon .
plenty of boondock camping opportunites in oregon .
their trailers weigh more than most due to an inch taller steel frame underneath.
they have shock absorbers , large holding tanks , spare mounted under the frame next to the axles , welded aluminum house framing , and so forth .
gravel roads chew up cheap trailers.........