Level 2/anatomy scan

I go for my anatomy scan on Friday! I'm so excited to see my little man and see how much he's grown! But I was just kinda wonder what to expect and if I should do anything to prepare beforehand. Is a full bladder required? My scan is at a specialist and it's 2 hours away. I don't want to ride all that way with a full bladder if it's not necessary. When I had my NT scan, the Tech actually had me pee before she could continue because my bladder was in the way! Haha 😂 But anyways, yeah so those are my questions. What's your advice ladies?