personally, i dont bother much with the pink stuff. after draining the fresh tank, and opening low point drains, if you have a compressor or can borrow one, i blow out the fresh water lines with air pressure (i think 35psi max, i forget exactly but its in the manual). there are adapters for a few bucks that connect to the city water connection on the TT for a compressor. pour some pink stuff in the drains just for any water left in the traps. i also pour a little down the toilet, in case there's water down there also. probably not necessary as there's plenty of room for expansion in the tanks, but i figure its easy and why not.
this makes de-winterizing in the spring super easy, nothing to flush from the fresh water tank/lines as nothing was in there. the pink in the drains just gets flushed when it's time to dump the first trip out.
oh, and make sure to use an oil-less compressor