The nearest convenience store/gas station is in Pine Cove, 5 miles south of the James Reserve. The closest grocery store is in Idyllwild, 10 miles south of the Reserve. By town order, there are no chain food or variety stores in Idyllwild but an assortment of local owed stores provide a wide array of products for sale. Unless you are planning on driving to Pine Cove or Idyllwild, you should plan on bringing all that you need for your stay at the James.
The nearest conveniences to Oasis de los Osos are located more than 10 miles north (Cabazon) or south (Palm Springs). The local village of Snow Creek has no public facilities.