Thorin and Company only move ashore – “a-” preposition 1, in a situation – during the barrel adventure.

• 09.059 close ashore at one point
• 09.062 and waded ashore,
• 09.066 If they had come ashore
• 10.012 and helped ashore

“ashore, adv.2.” OED Online. Oxford University Press, March 2015. Web. 18 May 2015.