So what is the correct thing to do here? Do the selling yourself or go along to sales meetings?
If it's a bigger deal, you can probably justify it. Or you stack smaller deals in to one 2-4 week trip.
Sounds inefficient, but you can pack a lot in - plus you'd be surprised how convincing getting on a plane and flying around the world to a customer is. "I'm coming in from Australia" is also a great door-opener.
Doesn't work in all businesses - but for a lot of B2B it is effective.