I believe that everybody tends to overthink this one.
Unless the trailer shows tracking problems (nose-seeking, non-parallel track, etc) the difference in weight distribution is negligible for two or even three inches high in a thirty five foot trailer. A few hundred pounds out of 2,500 to 3,000 total on each wheel isn't going to destroy the tires.
People "talk" about uneven wear, but I cannot come up with a single documented case (go search) where tire failure was directly caused by nose-high (or nose-low for that matter) towing. Usually the talkers finally admit that there was also bad alignment, bent axle, cheap tires or some other contributing cause.
Since our tires usually age out well before the tread is gone it just isn't a real issue. If you are a super worrier, rotate the trailer tires to even up the "excessive wear".