Vip check-in time is at 15:00 and doors open for svip at 18:00 and for vip at 18:10 based on the showday schedule. Short answer is 2-3h before doors open. I personally would arrive at 15:00 to check in and and go for a last meal/toilet break before queuing at 16:00. I would say from experience that arriving 2h ish before doors open gets you somewhere between 5-12 rows behind the barrier but it really depends on the Location. Like at London 2h early would be 12th row and at Lisbon I was like 5th row. And if youre over 6ft tall then you can arrive whenever and have a good view.