I like what you suggested Ed, but one thing that may be a problem.
We don't know what bed length Anzac has. On my Nissan Titan I had, it was a 6'-6" bed which meant that if I hauled a bike, the rear tire would be on the tailgate.
I did some quick checking an my Titan tailgate had a 200# weight limit. I told my buddy next door about it and he checked his Ford and it had a similar load limit for the tailgate. Technically if I sat on the tailgate I was overloading it...

Before I loaded a bike into a pickup, I'd check to see how it fits and what, if anything is on the tailgate. I've seen touring bikes in pickups with the tailgate closed. I'm assuming an 8' box in that case. If Anzac has an 8' box, it's a great idea.
Anzac, have a safe trip. Buying and reselling a trailer sounds good, but renting a U-Haul bike trailer would be a no-brainer, just wrap the front of the bike and bags really good to protect from stone chips and it's a one-way rental with no hassles.