I can’t speak for Hunt Club but YEH-5 in the second half of the year should be solid N with a mix of T, according to the specs. Granted, I’ve noticed it tends to vary a lot from place to place. I’m not sure any YEH class in the second half of the year would be my choice for a horse that hasn’t done a HT before and is just about to start out at BN.
That said mine just did a YEH-4 at a big show in Area 3 and I was very disappointed at how soft it was set, mine is showing N and was not impressed by the very small and boring course. A few months ago it would have been fine but mine has already schooled some Training questions by now. There’s supposed to be at least something on course that allows them to show boldness according to the guidelines “Jumps that allow the horse to display its boldness are encouraged, such as ditches, trakehners, Weldon’s walls, etc” but it was nothing but a series of very simple BN fences. Bummer for us and our very unimpressed-looking 4yo. The YEH-5 course there followed the Novice HT course for the most part, it was pretty soft too IMO for a YEH class in the second half of the year. We’d have much rather run ours around the YEH-5 track.