The first trip was my idea but I didn't expect thanks from anyone? 
....You may not have expected it but I remember thanking you. And although it's simply good manners, I did mean it and I am still grateful for inviting me onto that trip - Without which I wouldn't be on this one!
As you say, be nice if we could move on and stop banging on about who's idea it was! 
....Agreed, so I'll now shut-up unless someone challenges me.
Safe but Fun Journeys!