The 26 is trailerable (with the right trailer and vehicle), the 27 and the 28 are both deep, fin-keel designs (4' draft on the 27, some were 5', the 28 had a 4'6" fin-keel, option on the early models was a K/CB with a 3'6" draft). The 272 had a wing-keel (2'11" draft) and was trailer transportable, in other words, not really trailerable (9' beam and 5000+ #) but could be trailered home for the winter. The 280 was a 272 with a different deck and would be about the same weight. The 272 LE would weigh about the same as the 272 (272 LE had a diesel inboard as standard, was option on 272).
The 27 and 28 weighed more than most would want to trailer (7000#+ on the 28, 6000# +/- for the 27).