The part that takes longest to dry on mine is where the sides meet the floor. The side tends to lay overtop a couple inches of the floor; even if I mop up the water in that crease with a towel, it can take all day to dry completely. It won't hurt anything if you pack up the damp kayak to travel and then set it out to dry a day later, but you won't want to pack it damp and forget it.
If you're buying an inflatable, get a really long one because it will track better. When you are packing it up anyway, a few extra feet don't really matter much. And tracking is a big issue with most inflatables.
I had a Hobie Mirage Drive for one summer, and with the pedal system the kayak length hardly matters. It tracks wonderfully. But I sold it because I didn't like sitting so low with my legs up; after an hour I'd get stiff and my back would start bothering me from inadequate support. The ideal rig IMO would be a Hobie inflatable with Mirage drive and a somewhat raised, solid-backed seat. Not sure if they make that.