Everything is capable of most things, now I haven't taken a mars trailer to the Cape, but have been up 46 times and on numerous occasions towed trailers up the Cape and other remote areas, the single most important advice I could give you is drive to conditions, 2 things that make a difference is speed and tyre preassures. On your trailer, you should be checking wheel bearings, trailer seals, any exposed wiring or plumbing under the trailer and your own ability.