I recently bought one of those chainsaw bags, an axe cover and they made a 'spade/shovel' end cover so the sharp spade end is covered. The chainsaw bag is very well made. I empty the chain oil reservoir back into the bottle before transport to limit the oil leakage.
As far as chains go, i only take a small stihl 170 with me camping to save space and the chains are only about $20ea so if the file has no luck (i use a manual file) a new chain goes on.
cheers