I will be on an organized tour in 2015 basically from Tokyo to Kyoto. I want to save some money and travel on my own from Kyoto (or from Osaka) to Hiroshima. I am American and don't know any Japanese. I "think" I can pretty easily see the sights in Hiroshima on my own. However I would also like to see the Itsukushima Shinto Shrine at Miyajima. I have seen instructions on TA how to get there from Hiroshima. Would I get more explanation if I were on an organized excursions or go on an excursion once I get to the Shrine?
Also, are there organized excursions that would take me to Omishima and Ikuchijima Islands to see the sights there? I have looked on-line but don't see any excursions to those islands from Hiroshima. Could my concierge at my Hiroshima hotel help me?