I went to a 8 matches in 2015 including “lesser” ones like Japan v Samoa and QF/SF.
Watched Scotland v USA at Elland Road, the Leeds UTD stewards couldn’t believe that it was all mixed seating and couldn’t understand why there were England/NZ/Australian etc supporters at the game.
I’m not a huge fan of internationals but love the game and travel all over the place to watch Saints, had a trip to Lyon in January, last year I drove to Heidelberg to watch Samoa v Germany just because we had one Saints player playing.