
I'm planning on leaving next October from Chicago for a tour of the Trans-Mongolian Railway that drops me off in China. I'll overland through China, SEA, and fly to Australia from somewhere in SEA and hopefully get a WHV and stay in OZ for a while.
The tour will arrange visas for Russia, Mongolia, and China. Not sure if I should give them my Ireland or US passport info. I know I'd like to use the EU passport for SEA, as it's looking like the visas are cheaper for non-US passport holders.
My question is how do I do this? Wherever I start my Irish passport (as it'll come in the mail to me in Chicago) isn't someone going to wonder why the pages are entirely blank? I know I can't enter a country on one passport and leave on the other, but otherwise, I have to idea how to make this work. Help!