Hi Andrew,
I'll try 2), or most likely wait for the update - I no longer use iTunes with my iPhone. As for 1), no the app didn't crash, so unfortunately I don't have a crash log. The trip wasn't that long - 8 miles and I used OpenStreetMap Cycle as the source where I had downloaded the map data before starting the hike. The app was slow already when I started my trip, but it got consistently slower as we progressed.
Hiking season is ON now in the North East, so I will have a lot more time to put Gaia through it's paces!
K