Those are some nice pictures and places you have visited. Wish I was there. I havent been able to get away this summer yet. Its good to know that those cheapo trailers can do the works and that the home made skewer is doing its job. I was fearful that the rod may break as it is not as strong as the originals. I was able to bend the ones I bought even though they were suposed to be hi tensile steel. They are also of course not as thick as original skewers as they are threaded all the way along. Any way good luck with the rest of your journey and I hope u get your BB fixed.
I think if you keep the skewers nice and tight you don't have to worry about them bending. I flattened both sides of the skewer barrels with an angle grinder so they'd receive a spanner, and check them every morning before setting off. Have had zero problems with the trailer so far. The cheapo tyre doesn't seem to be wearing as fast as the one I used through Scotland, probably because I'm carrying a little less weight, but I've got a spare ready to go in any case.