It's usually Dressage and SJ first day, XC (all four phases) second. Think at Aldon these are usually Sat and Sun respectively. THere is a (voluntary) briefing at some point, but no trot-ups. Sorry to be vague, never actually done the Aldon one but seen it going on alongside the rest of the event. And no-one else seemed to be replying so I thought I'd get the ball rolling
Dressage and showjumping on the sat and roads and tracks, steeplechase and xc on sunday. There is a briefing on the friday night and saturday night i believe. For the junior there is a course walk with someone on the sat after everything.
My little sis competed in the Junior novice two day last year.