Roger I got your message this morning 

.  I saw your post in the Steve's starter section and, I think Friday would work best.  I pulled my trailer out, and it will give me a few days to do a little maintenance to it.  One of my kids busted a tail light, so I need to pick one up and 3 of the tires are looking pretty dry.  I am going to try and pick up another set in the next few days.  The tire on there now might be ok for a short trip like we are making, but I still don't want to risk it.  
Since I was deployed last summer, the trailer hasn't moved in over a year, so it needs a little TLC.  As long as I can get some tires we should be fine.  I just found some on craigslist for $50 but the guy listed them as 255/75/15?

  I have never heard of that size so I asked him to check the size.
I don't have anything Saturday either, so I am pretty flexible time wise, just need some parts.