Mars should be far enough from the sun in October 2014 to be in a dark sky for somebody on the this planet to make observations. See Curt's charts further back in this thread. The solar elongation is above 60 degrees I think - could be higher
Sixty is very close, Tonk; actually about 58.8°. So you are quite right that it will be in the nighttime sky for some observers. And indeed as you implied earlier the error range would make any hits on the near or far sides equally likely.
I’ve been in contact with Aldo Vitagliano, the creator of the Solex astronomical numerical integration program. He developed 50,000 clones of the comet that fit within the possible error range of the still quite preliminary data. After running them through Solex he got 6 hits or 0.0012%. So a collision appears extremely unlikely, though still possible. Aldo hopes to know more tomorrow. If so, he’ll send me a file with a thousand clones including a few impactors to input into my copy of Solex. That may cause me to fine tune my chart: www.CurtRenz.com/comets