> If one submits several different applications (with separate six dollar payments) does the system automatically eliminate all your other requests when one request is accepted?
Yes. (I had to review the 2013 info to make sure.)
In 2012, only one entry could be made. But last year, they opened it up to multiple applications and allowed for post-lottery acceptance or decline of a winning entry. So you can enter as many times as you have $6 entry fees (and time to fill in the info). The $6 entry fees are non-refundable.
Each entry is processed, and as soon as one (of the possible 15 start dates on that particular entry) is successful, the rest on that entry are canceled, and all the other entries made with separate $6 fees are marked as unsuccessful.
After the lottery, you must then logon and accept (and pay the $15 per hiker fee) for the slots you won. Or you can refuse the slots as well. If you never accept or refuse a won reservation, it will be canceled (by May 1 I think).
If you and your friends all get together, you can make multiple entries and maybe win multiple choices for a trip if you use separate accounts on Recreation.gov.
By the way, the 2013 Lottery information is here: 2013 Whitney Lottery Information