I've recently developed HP5+ pushed to 1600 which went through quite a bit scanning (at least 4 if not more) and I see no damage on the negatives. Same result with tmax 400 @400.

I prefer to avoid any hassle with airport security, specially in the countries which might be considered "hot". I would actually consider both, Jordan and Egypt to lean towards the "hot" side at the moment.

In both countries you can also expect your baggage is going to be scanned at the hotel (at least they did it in my hotels in both countries) on each entry. Better put the camera around your neck before you enter.