Not a published author...and knowing I might never be....I probrably am not the best to answer this question for you. But,when has that ever stopped me from giving advice???!
I think it is best to write about something you know about, but few fantasy writers have ever met an elf, a wizard..... so there goes that theory
If you have a friend that would allow you to go on a cross country trip....or a friend of a friend....
That may give you the experience/knowledge you seek.
Or hang out at a truck stop....having traveled a good bit I enjoy stopping at the many truck stops...truckers are somewhat isolated and though use to it, there are those that would like a chance to talk to someone during a break.