You don't need a guide for this trek, but you'll sure have lots of applicants. It'll make things easier if you've got a route description and/or map; if all else fails, see if it's possible to buy and download a single chapter or two from one of the Lonely Planet books. You can either email it to yourself or carry it on a jump drive.
Or approach any Westerner you see; they'll all be carrying the same guidebooks and referring to them constantly (as did I).
Sorry I don't know about a place to leave your bike.
Mark
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