a. Flying out of Delhi? Fly Spicejet.
b. Going to Leh? By Bike? Take your own bike.
c. Flying into Delhi? Hotels?
d. Transiting at Delhi?
e. Booking a Waitlist ticket? There may be a way out. Click here
f. Going to Sikkim? Use Bayul Tours and stay at Fortuna Lachung.
g. 3 week itinerary covering
h. Flying into Delhi late at night? Afraid - no way! Click Here
i. Extremely low usage and everyone pushing you into buying a diesel? No way. Think again
j. Moving to Gurgaon? Here are some TIPS
k. Going to Triund? Trying to plan? DONT!
l. Sikkim? Yes. Foreigner? Maybe NOT. Basic logic applies as much to Indians too!
Even otherwise, for a Leh guy - the best resource by far is:
http://www.bikenomads.com/wiki/index.php/Leh
or if you wanna ask on a forum: http://www.bcmtouring.com
Feel free to browse, or to google around. There's always the X on the top to click otherwise :)
PS: Use any info at your own risk. Its my experience and its India - YMMV, greatly :)