Sounds like what happened to me the other night. I got an invite shortly after putting the flag up and after waiting an hour or so for them to fill the party we finally head off to camp. It's a good 15-20 min trip from Jueno and when we finally do get to camp and start killing things, it had a lot of promise. One person even levelled within a few min. Then they dc'd and 2 or 3 more said they had to go. So back to Jueno I go and do a quick /sea and sea that quite a few people are looking. So I grab the blm from the party that just broke and we start to form a new one. Within 10 min. I had a blm, nin, rdm, rng, thf and smn party going. The party started around 10 or 11 eastern and lasted well into 5am the next morning bringing me almost to 73. The two members that did have to leave gave plenty of warning so we were able to find replacements for them and keep going.
I was actually quite suprised at the number of people lfp when so many jobs were looking and there were enough to build a few good parties.