If possible, store your firewood in a shed or garage to keep it dry. If this is not possible, invest in a decent tarpaulin. Make sure it is firmly anchored so it does not blow off.
While you may think that firewood is all the same, this apparently, isn't the case. Hardwoods for instance, are quite dense so they tend to burn much longer and generate a hotter, more intense flame.
If you're stocking up on firewood, it would be a good idea to keep things local. Bringing in wood from outside your vicinity may prove disastrous as any non-native insects they harbor may infest the forests in your area.
Did you know that the wood you burn needs to be properly seasoned? If it isn't, it will retain a high moisture content and will be very hard to ignite and will not burn well.
If you're marooned on an island, the quality of wood you use to make a fire won't really matter. However, if you're sitting by your fireplace, you're going to have to be specific about the wood you use so you can achieve the effect you want.
In addition to an outdoor storage location for your firewood, you should also have two indoor spots; one for about a week’s worth of wood and another near the fireplace or stove for immediate use.