JK. It's a continuous duty overnight. There's not enough time for a legal overnight, so it's two legs separated by less than 8 hours.
Example: Depart CLT at 2200 Arrive BFE 0000
Depart BFE at 0600 Arrive CLT 0800
Pokey you're quoting the BEST case scenario! Don't forget about the camping trips, two legs before your standup, JA'd when you land in base and are "done", being delayed 3 hours before you ever leave, OR my favorite is doing all of this for 5 days straight!!!