One event per leg, not one block per trip.
SkedPlus+ exports your month as a single solid block per pairing, report to release, with the trip sheet buried in the notes. Drop that file here and get it back as a real schedule: every flight its own event, travel and hotel blocks around it, and a report alarm.
Timings
The alarm is a standard display alert. A calendar file cannot send a text message, so if you want an SMS you need an iOS Shortcuts automation watching the calendar.
Crew & hotel privacy
SkedPlus+ names your whole crew, not just you, on every leg. Strip or anonymize before this leaves your device.
Import onto its own calendar so you can wipe and re-import a month cleanly. Event IDs are derived from the pairing, so re-importing a reissued month updates in place instead of duplicating.