Hi all, While vacationing in Arizona this month (without the trailer) I called in to Costco at Prescott, Arizona. To my surprise I found they sold diesel from either side of the pumps on the far right hand side of the forecourt as you enter through their one-way system. Their diesel was significantly less expensive than other forecourts in the immediate area (about $3.53 as opposed to $3.89). The canopy appears large enough to get any RV underneath. Just thought this may be helpful to anyone planning to snowbird in central and souther Arizona this forthcoming winter. I'd also be interested to hear if any other Costco has diesel pumps.
