Yo, DJMc 1961!
I also travel internationally and share your pain. Prior to "upgrading" to Office 2013, I used Outlook and used Sync2 to sync my Outlook with my iPhone/iPad. To do this I had to use a setup through an Exchange account.
When I "upgraded" to Office 2013, Sync2 stopped working for me. I just switched over to using the iCloud since I cannot get Sync2 to work (nor another program CompanionLink).
What you might try is to enter your appointment in the Outlook calendar. You will see that you still have time zone selection for both start and end. After that, move the appointment to your iCloud calendar. I have not traveled yet after I have done this, so I don't know how this will look once I reach Europe (I go tomorrow).
At least iCloud now plays better with Outlook. For me this is a no brainer for Apple to to adapt into their product iCloud. Since I travel quite a bit, this is frustrating enough for me that I would consider another operating platform, which woulb mean my leaving the iPhone/iPad products. This should be enough incentive for them to fix their "free" program if more users feel this way.
My company does not offer an Exchange account for the employees.
Joe