I can't speak specifically for the dining package side, but we sat on the Asia side for our FP+ last Tuesday night (during spring break crowds). We leisurely started to walk from our safari ride in Africa over to the theatre right around 8:10ish (fastpass return times for 8:05-8:30pm) and the closer we got to seeing ROL we noticed it looked quite full so we hurried on in at that point. I would say there were a good amount of seats left but it was not empty to say the least. We sat down right at 8:20 but by 8:30 it was packed for the 8:45 show. The other side (on dino land) that seats dining packages and stand by looked about as full as our side or maybe a little more. This was for the first show too. Hope that helps!