I have a small update - I had hoped to do more; but I ordered 25 yards of 38" wide 8.9oz S-glass from US Composites last week and it arrived Thursday. I used a can of low expansion (urethane?) foam on most of the gaps and cracks (some from the damage and some that didn't glue well) and that's where it sits, now.
I trimmed off the excess with a hacksaw blade, and it looks to be very sturdy foam. I will rasp and then sand it down. I'm thinking I will fit the windshield and the wipers, and then start to 'glass the roof and the hatch door.