I have not found taking a filter to be worthwhile on most US tours. That said there are places where it makes sense. On the Sierra Cascades route it was well worth it. It was very hot out but there were lots of ice cold mountain streams. Freshly filtered ice cold water was nice to have.

On the ST anywhere that there wasn't frequently available tap water there also was no surface water to filter.

On the TA I found little enough use for it that I mailed it home.

The new filters like the Sawyer mini or the Squeeze are light enough (about 2 and 3 ounces respectively?) that taking them along is more tempting. I have used both a Squeeze and a Mini a lot for backpacking and also on The SC and found them very trouble free. After long storage it sounds like a good idea to check them before a trip to be sure they are flowing.

The problems with the bags can be avoided if you handle them with care and carry a spare. I think folks squeeze them too hard. I have used them a lot and never burst a bag. I either squeeze gently or if not in a hurry hang them up and let gravity do the work