Over the last 25 years of so, I've had to lift my bike up into stuff or over stuff a few times, and have been against g the idea of trailers as one more thing to lug at airports or the rare time of getting a lift.
My handlebar bag setup works fine with my interrupter bars, just had to angle them down slightly and no issues, in fact they are similar in angle to my mtn bike brake levers.
Never seen a handlebar suspension but my mtn bike suspension is fine with a bar bag
No airports involved in my trip that includes my bike
The handlebars are shock loaded.