This far out, it's hard to guess what things will be like in the parks. For August, I think it's hard to guess what crowds will be like because schools go back in session in August (staggered throughout the month) and the parks begin to transition to their non-peak season schedule, but at the same time, the summer-long SoCal and SoCal Select AP blockout also ends (8/19/18 is the last day). So I would guess (nominally) that mornings on weekdays (folks are working and in school) will be less busy than evenings (after school and after work) and weekends (Fri afternoon through Sun). I personally think you might see lower crowds the last week of the AP blockout than the week(s) after...