Hi jycmayne
This will be my 2nd holiday with JY, but I went on quite a few singles holidays with another company (who are now defunct) several years ago. I have been very impressed by JY. Our baggage went missing en route to Thailand, and our rep was extremely efficient at getting it sorted out. Everything else went like clockwork, and in spite of a heavy schedule, our transport and guides were always exactly where and when they were supposed to be.
I don't really have any tips as I haven't been to the States before, but the information sent by JY is incredibly comprehensive, and there are excellent reviews and tips within this forum.
I'll look forward to meeting you at Heathrow. As I have mentioned above, I've booked the travelodge at Hounslow, which is excellent value for money, and has easy access to Heathrow. Let me know if you have any other questions. Best wishes, Marion.