Hello Micha
Your photo of the caravan looks like it has partial livery of Nature Air out of Costa Rica. (Possible repaint or livery mod in progress)
N___GC registered Caravans belong or have been owned/leased to Grand Canyon Airlines.
Two Caravans, that went to Nature Air (Costa Rica) were:
N183GC c/n 208B1210 reg 02/11/11 Xebec Llc Kirkland WA, canx 11/2/11 re-registered as TI-BBC
N181GC c/n 208B-0900 rg 12/13/07 Zuni Llc Kirkland WA, canx 12/8/11 re-registered TI-BEI then back to USA as N181GC in Feb 2016 (ZUNI LLC ).
http://cdn.airplane-pictures.net/images/uploaded-images/2011/11/30/170256.jpg
Hope this helps. Happy Hunting. :-)
John