I'm in the I don't give the party any camp. The availability of healing potions to the party depends on the edition my group is playing. In 5.0E, potions of healing are on the equipment list so are available for purchase in settlements of town size or larger limited only by the party's available funds and ability to carry. In 1E, for example, they are not. In 5.0E, potions of healing can be crafted using an herbalist's kit so again are available limited only by funds, time, etc. Otherwise, they might sometimes be found in monster treasure the contents of which I determine randomly using the 1E "treasure type" system which produces a certain frequency, but I have no idea what it is.