I booked Summit tickets over two months ago online. I looked up what time sunset was, and we got our tickets for 8pm so it would be daylight when we got there and evening when we left. Best decision I made!!! The lines were GHASTLY, we walked past one line that made me shudder! With our reserved tickets, we stood in a 4 person line and we were through all the lines and at the Summit in 10 minutes. I wouldn’t do it without the reserved tickets. Who wants to stand in line for 3 hours? Make sure you reserve tickets online in advance and book go sunset!