Personally, I wouldn't ask about travelling until I've officially been offered the job (it means then they really want you, and that's good to know and gives you a little more of a bargaining position). But, onto the question: to tour or not to tour? It really depends. On you, and where you are in life and how you feel about what you want to do.

On one hand if you tour, you will fulfilling something you've been wanting to do, plus you are doing it when you are able to tour. I would heartily recommend you do it while you can (I should disclose I'm writing this as a married man with 3 kids and a mortgage ).

But.... on the other hand, you might be turning down that dream job (don't know if it is) or that job that gives you a stepping stone to bigger and greater things in life -that then ultimately might enable you to tour more! And unless you're into eschewing all material things (which try as some people might, but you can't) you do need some sort of springboard in life. Of course there are some other practical things to consider (if you are in the USA) -benefits can include health insurance as well as retirement savings plan -both of which you will almost 100% certainly need.

So I say I definitely tour....errr.... no, go for the job.....ehhhh on the other hand, go touring.....but wait, you do need to get a reasonable job so take the job.......no, hang on......

You get the idea, it's up to you! Good luck with whatever you decide, it's a nice dilemma to have!