Hidden Excursions

I need a 1 to 2 color t-shirt design for the back of a charcoal grey t-shirt. It is for a tour company that tours el yunque in puerto rico. They do a tour that has waterfalls to jump off, rock waterslides and a rope swing all on a small creek/river. I would like something that embodies going on a tour of el yunque and maybe encorporaring the logo in some way the logo is going on front also, just an FYI. Attached is the logo in .ai format.