NCL is only busy at times - unless they have miraculously quadrupled the business there in the 5 months since I left. Doubtful.
The commercial traffic comes in phases. It can be bedlam for about 90 minutes and then just as quickly you can go almost an hour without a single airline movement. Learn the pattern and work around it. Winter is the airport's quietest period (around October to April) as the charter traffic drops off to a minimum.
However, it is the weather that really dictates when you can go bug smashing in a little spamcan.