My fellow blogster Devonna from Lotro Stylist has put together A Cosmetic Guide To The RoI Quest Rewards on her blog. If you have any characters that still need to go through Dunland and Isengard, this guide could help you pick your rewards more efficiently.
Rise of Isengard has a completely lineair quest system, so you are forced to do the quests in a certain order, and cannot go back later to do a quest that you missed. With this guide you can plan your cosmetic awards ahead of time!

All praise to Devonna for investing her time and effort to create this fantastic guide!