I did the whole JMT without camp shoes, using Inov-8 Roclite 295's.
First off, my shoes were never a problem... Never too hot, didn't get a single blister, and my feet never ached, so I was never DYING to get out of them.
But when I got to camp I'd let my feet air out for a bit while taking a seat. Then I'd switch my socks to my more cushy camp socks, and wear those with my shoes while walking around. I hiked with my shoes VERY loose, as per Ray Jardine's advice, and to my surprise it was very functional and comfortable... so my shoes were essentially slip ons.
For those reasons, I didn't miss camp shoes at all. However, there were days where I got my feet soaked towards the end of the day, and despite them mostly drying out, they'd stay damp. In those instances, having something dry would have been nice. But the thickness of my camp socks kept my feet dry and warm, and the socks would dry from that slight dampness as I slept (if they retained any water at all).