Just a thought,but I just came back from a two day event and am pretty exhausted.I keep myself in good shape.In talking with a few of the other racers my age(40+) the general consences was that a five day nationals is too much.Most agreed that after 7 races the standings change very little.Three day event with one lay day to be used if you missed one day would seem to me to be the ideal.I think as the racing population is aging a five day event is more of a deterent then an attraction.As stated earlier just a thought feel free to bash away