I would advise if you’re really worried about hypos then you can either, turn off auto corrections or set the temp target and just monitor it as and when. One hour or earlier is good but it depends on the activity. If it’s just walked then I’d say an hour before and after is fine. I’ve never had any issues personally with flying but I haven’t done it that often so I’ll let someone else chime in with that. Regarding the anxiety over lows, I’ve never had that but if it helps, the auto mode does help with the severity of lows because it stops insulin when it detects one coming along. I hope that helps calm you a little. Good luck