This is the long term we are talking about, not a few trips. A synthetic fill bag will gradually lose its ability to recover its original loft, thus limiting its useful life to 6-7 years vs. 15 or more years for down. Reference table. That's why so many of us have gritted our teeth and bought those expensive down bags that we are so paranoid about--in the long run, they're cheaper as well as lighter!

In other words, after a few years of being regularly compressed, that 32 degree synthetic bag (which, at 2 lbs., is probably actually not that warm) will gradually become a 45-50 degree bag.

Several things will prolong the life of any sleeping bag, regardless of insulation. One, as mentioned, is not compressing it too tightly in the pack for too long periods. A second is to fluff it up in the clothes dryer (very low heat) when you get home, which both dries and helps to reloft the insulation. The third is storing the bag very loosely in a large breathable storage sack or hanging in the closet (with no pressure from hanging clothes on either side, which assumes you have more closet space than most) or on the floor under the bed (loosely covered with a sheet to keep off dust bunnies).