Changing the subject to non-Audax, I had an infamous 'pack' whilst attempting a 3 Peaks record in 1979. I left Fort William at noon (timing to satisfy Glasgow Herald) to run up Ben Nevis and then cycle down to the Lake District to run over Scafell Pike. On the ride through Lancashire, I was battling into a (felt Gale-force) headwind, when it struck me that if I set a Record, it could easily be beaten riding with a backwind. So, after 32hrs I jumped into my support wagon and we headed for home.
The following year, I repeated the attempt, starting from Carnarvon at 0300hrs (timing to suit MY schedule), climbed Snowdon at dawn, managed to clear the Lake District by dusk and descended Ben Nevis before dusk the following day. Record in the bag 41h 51m!! (Note, you will understand I have little time for the current '3 Peaks Challenge' game, where teams can sleep on the road to complete in 24hrs but that is changing the subject to mountaineering).
That was 440miles on the bike and 9hrs in the mountains but with a full support team; not quite the way we play Audax with lengthy cafe breaks. But AUK was still in its infancy then.
One thing that strikes me here is that once you have done all the planning and overcome the reasons for packing, it is so much easier to do it second time around.
SteveP (3peaker)