I did the Zeppelin thing last night and actually once I knew what I was doing it didn't seem so difficult. I did leave god-mode on even though it probably wasn't strictly necessary because I am aware of how quickly you can lose health as a dragon, which means dying if you don't keep a constant eye on the health-bar, and I simply don't have enough concentration for that and the Zeppelin's health bar and the wyvern's status and keeping an eye out for stuff I may have missed and seeing what I need to deal with and checking the Zeppelin's route and keeping an eye on the Zeppelin's current location and trying to do all that in three dimensions when I can't remember which way is up at the best of times.
For some reason the magic "no cooldown" button didn't seem to work, butit turned out to not matter. I also forgot to turn off god-mode when I encountered Ygerna but it didn't seem that difficult a fight anyway. I saved right at the start so I can go and redo it if I want.
I'm still spending way too much time buggering about with my DV2 program. I still can't figure out what's the problem with my compressed version, but the zlib stuff is quite poorly documented and example code I've found to date is often poorly written and seldom very clear so I don't really know what I'm doing. I can decompress my own but DKS will CTD whether before the menu and on load. Might be a bug, more likely that it's expecting a particular compression scheme and I've no idea how to analyse the vanilla files to see the schema used to compress them in the first place. But it is properly happy with my uncompressed ones, finally, since I realised I needed to put the component files on 32K boundaries. I think it's probably time to stop faffing about with it, no point in being perfectionist about something that'll see such limited use from now on. Well okay, "perfectionist" is a bit much since it's quite far from perfect!
Dunno what to do with myself now. I guess I'll use the developer mode to go and explore to see if I missed anything cool. Which is very likely tbh.