For WG, I always use a simple soda bottle. I mark it fuel, and use a different type bottle than my drinking water (gatoraid bottles.) I also expand them with a touch of heat to make what I call a fuel cell. The bottle typically weighs about 1 ounce, give or take. I make a seperate cap with a piece of vinal from stripping some 12ga household wire. This is great for priming and for filling. A slightly smaller hole is needed then carefully the tube is heated in hot water and worked through. Dry thuroughly with some TP, and superglue it in. No, the superglue does not stick all that well, but it hardens the whole joint some. I tried epoxy, but this comes loose after about a year.
These bottles are tough. I have jumped on them and they do NOT break. Under extreme pressure, you might blow the top off by jumping on them. I have one that has had fuel in it for over 5 years. Note that Auto Gas has additives that *can* soften/disolve the plastic. I rarely use it, anyway. In a different thread, a gentleman also uses these for pumping and feeding his Whisperlite. I use a SVEA, so I never tried that. (I get around 10g fuel per liter. Boiling water is slightly less but I also simmer/cook a bit.)
The same bottle also works for Alcohol. The tube is a great filler, AND, it sucks up excess fuel out of a stove. Note that the higher water content, if any, is easily diluted in the rest of the bottle.
The density for WG is around .78. So, .78 * 12floz is about 9.36 oz (weight.) Adding in about 1 ounce for the bottle is 10.36 for a weeks supply of fairly high density fuel. (Roughly WG is ~20,000BTU/lb, Butane is ~21,000, Methanol/ethanol blend is about 10,500. Butanes need a pressure container, about 3.7oz/4oz fuel to transport, though, making only slightly better than alcohol. WG/Alcohol just needs a 1oz bottle for 10oz weight. However stoves for WG are *heavy* and most are not very efficient. Esbit is about 13000BTU/lb, but does not simmer, nor, is it easily adjustable and it leaves a residue like wood.)
For 7 days out
A stove and fuel is one luxury with camping I ALWAYS have.