Hi,
I am considering buying a utility trailer to haul our camping stuff for my family of 6 this summer. Has anyone had any experience with the utility trailer I have linked below? How are they at highway speeds like 70 to 75. 
i’ve never pulled that particular utility trailer, but I have pulled something similar, and they are fine at those speeds.
Fixed.
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Is that from Northern Tool and Supply?
I used one like it to haul soil across the country for research. The short tongue makes it fishtail mroe and harder to back up. Take it to a weld shop and have a longer beefier tongue put on it if you are hauling anything remotely close to the weight capacity.
Also get a couple spare sets of bearings. they are about $15/wheel.
You Southern Californians… always driving like your trying to escape a nuclear holocaust… ever seen one of these?
Know what it means? It’s the law. Learn it, live it, love it. Especially whilst towing. Tsk, tsk!