Which lenses to get?

Hello reddit,A few months ago I got my very first dslr, a Canon EOS Rebel T6i, which came with an Ef-s 18-55mm lens.I'm going on a trip in a few weeks to Oregon where I'm going to loop from Portland to Grants Pass, down Eastern Oregon and up the coast. I'm assuming I'm going to be taking a lot of shots of the landscape and also several of me and my travelling companion.Is there any lens(es) you guys would recommend >$300 I should purchase for the trip? I don't anticipate travelling again for at least a year or two so I want to make sure I take the best shots possible.Thanks! via /r/Beginning_Photography http://ift.tt/2tZKjPA