Love the Camplites! Been drooling over them ever since they first came out.
No experience as an owner-yet- but here's my take as a wannabe:
Though I've seen it stated elsewhere too, I dunno about that "double axle margin of safety" thing. On doubles, a single tire isn't meant to take up the whole load on that side and might actually mask the first blowout until it fails,too. Even if it doesn't, in the event of a blowout on one side, it's recommended that the remaining tire be at least internally inspected and preferably replaced due to likely internal damage caused by the sudden shock of uptaking the extra load. Failure to do that can and does lead to the "cascade of blowouts" one reads about here from time to time.
I've actually had a (completely self inflicted) blowout on my single-axle trailer. Two things I was "pleased" to find out during that experience:
-First, that tracking/control of the trailer remained stable even though I was traveling at about sixty and couldn't get over for almost a mile;
and
- The tire itself, though completely destroyed, stayed on the rim just as it's supposed to do according to industry standards!
I guess it boils down for me to: I doubt I'd base a trailer buying decision on that "redundancy of two axles" parameter.
Per surge vs. electric brakes:
I much prefer the latter, especially due to ability to manually apply from the driver's seat if necessary. Been a time or two with my small trailer that this is what stopped an unexpected sway event.
Also, surge brakes work by "opposing force", which means that they lock up if backing up even the slightest incline. Last, though this may not be a consideration on such a small setup: most weight distributing systems can't be used with surge-type braked trailers, and I believe the same is true of friction-type sway controllers.
Have fun and keep us posted on what you decide!
" Not every mind that wanders is lost. " With apologies to J.R.R. Tolkien