More things to think about: If you worry about the smoke/steam from the exhaust giving you away in cold weather, even if you've managed to effectively silence the generator, run some more hose from the muffler output into some nearby bushes, where it will dissipate. Or run it up and connect it to the same point where your dryer vents, so it's not something your neighbors wouldn't be used to seeing.

You can't run away from yourself. Doesn't work.

Ex Mos Publicus - From the Will of the People