I use the drom light bags. Only fill them up once I get camp setup though. Best way I have found to carry large volumes of water back to camp atleast.
Ill add my 2 cents about the drom and drom light bags. I have a 6L drom, and a 2L drom light. And a hose kit. Id highly reccomend these bags over any bladder.
Most versatile bladder out there, and the toughest. Iv had a platy water tank, platy bladders, camelbak, source. I popped holes in them all on a trip where water was scarce, luckily i had a 2L MSR drom light, the codura didnt give in to the sharp environment i was in. I would not reccoment the platy water tank, imo thats just an accident waiting to happen.
The Lite bags are very durable, more so then any of the other brand, but the normal drom bags feel bombproof!!! I see these bladders lasting me a long time, and imo i got the perfect sizes.
The 2L works good w/ the hose kit for a bladder for your pack, its easy to dry, and wont fail you, Now iv got the 6L, I can fill it up with 3L, go all day long, and at the end of the day i can load it up with 6L. Eat dinner, use it as a pillow or heater by adding boiling water, drink, make breakfast, and still not have to worry about getting water all day. Can also use it as a shower. The bag has many uses.
I think the 6L will come with me everywhere, along with the hose kit. Where water is scarce ill probably take both. Keep the 6L full in camp, and keep the 2L in the pack.