Get your rest early in the game, you'll need your stamina later.
If they follow the same model, the points get bigger later - take a look at the 3 legs from 2009, you'll see what I mean. So, getting a bit more rest earlier, will allow you a bit more time later in the game to get some of the bigger points on the later legs, especially the third leg.
Are you thinking because you have only done a 7 day rally that 11 days will be different? In my experience, it really isn't. In 2009, I took good care of myself from the beginning and on the last night of the rally I was on the phone with Chaz Fisher and said quite sincerely, "If they hand me another bonus pack in Spokane, I'll go back out!" I really did mean it at the time, I felt great and was having a fantastic time. Of course, when I got to Spokane and all my friends were there, I didn't want to leave anymore, but that shows what taking good care of yourself does for your spirits. By 'taking care of yourself' I mean - adequate sleep (only you know what that means precisely), adequate nutrition and water, adequate hygiene. The hygiene is oh so important. All that sweating etc in your gear can lead to all sorts of skin and private issues that will drive you INSANE.
In 2011, I was not so careful with my basic needs and, well...
Another thing to be mindful of is your emotional health. This may sound touchy feely, and maybe it is, but here's what I mean. The IBR, for most if not all people, produces the highest of highs and the lowest of lows. Sometimes within moments of each other. So, you need to have 'conversations' between your emotional self and your logical/rational self sometimes. If you need to actually speak in your helmet, or the corner of a truck stop, go ahead. (everyone in the truck stop already thinks you're insane, so why not add to the evidence) If you can do this silently, that's okay too. But do not beat yourself up too much ever, that will not be in your best interest. If you **** up, so be it. Move on. Don't let that carry over and cause future mistakes because you're too busy punishing yourself for past mistakes that you can't fix.
I hope that helps. If not, you paid for my advice what it was worth. You know you can talk to me if you want me to elaborate on any of that stuff. For the easily nauseated, I spared some of the details in the 'hygiene' segment - but I'm not embarassed by them, so have no problem telling you if you think it'll help!