So, I am coming to Yosemite in about a week's time. I did get a half dome permit (2 hikers) via the lottery system. However, as the trip is getting closer I am nervous that my wife is not gong to be able to make the trek up. Now, it's a dream of mine to summit Half Dome and I know that I can, but not at the expense of my marriage, lol. My question is: If I don't use the permit, is there any consequence? I understand that I lose my $16, but what I mean is, if I travel back to Yosemite in a year or two will I be unable to make the climb because I already had a ticket but did not use it? Thanks so much for your advice.