Suido, as in the Bungo Suido, as in area 7? Even i don't go there.
You guys know, that patrol success is more about how much renown you earn, don't be afraid to get a mission and just say, "Nah, not doing it".
As for aircraft, try the latest update in the 1.8 beta if your playing it,
http://forum.kickinbak.com/viewtopic.php?p=20999#p20999