Working abroad at clients site

[Vyse]

So am currently a few days into my 2 week stint of working abroad for my companies client. Most of my interaction is with the staff lower down the food chain. When it comes to leaving should I have a farewell chat with the CEO? I had a few minute, actually seconds chat with him when I arrived, he mainly talked to my manager rather than me. Or should I not bother? Ditto for the middle management, I've only had brief encounters with them so far.

Thanks

[Vyse]

Basically I work in the lab with the staff of the clients company. As the company isn't huge (30 people) the CEO was the guy that sorted out my accommodation for me and wl also be paying for my expenses. Of course I'll say my thanks to the people I spent most my time with over here and the department manager as she helped me settle into the place. Not sure how far up I should be going.