Talk:Expedition/@comment-175.140.53.229-20150315072946/@comment-25730832-20150315074012

I'm confused in your question more than I should be...from the expedition introduction tab:

"Once unlocked, an expedition can be repeated indefinitely without any penalty to subsequent runs. However, an expedition can only be attempted once at any given moment. Multiple fleets can go on different expeditions, but not the same expedition." 

And for Great success (same page):

Great Success can be achieved when: 1. Normal Success conditions are meet. 2. There exists Great Success factor(s):*Fleet contains ships with 50 morale or higher (i.e. sparkling)
 * Expedition requires Drum Canisters.

TL:SDR - YES