Hi Marcel,
Try to negotiate two mornings if possible
as Aviano has runway 22 or 23 (i am not 100% sure) and flying 90% from the west (landing) after 1300 it has no use to be in Aviano during summer (my opinion) In the morning however you can take excellent pictures during departure. Behind the gas station (farmers land but accessible) you can make nice take off shots with banking F-16's.....you must have seen them here on the board sometime...
The landing at the other side speaks for it selves....
But be in time operations hours are not like in Holland.....I have seen them return around 0830 local once but also only flying in the evening....
Goodluck,
Marco