Cady's visitor badge at the prison is spelled "Vistor".
At an absolute minimum, it would take almost nine hours to drive from Wyoming to Arizona (this is based on the closest geographical points, not accounting for likely places based on previous possible places for the fictional Durant nor the landscape around the school in Arizona). There is no way that, in that timeframe, the characters could leave Wyoming, drive to Arizona, and still arrive while the school was open.
Walt and Vic check in to a motel in AZ, but it has the NM sunburst cut-out decoration.
Norwood Young is visited by Walt & Vic in a motel in Arizona (stated as being 30 miles north of the motel where they are staying) and states he's tracking his phone (stolen by Polina). That cell phone was found in Wyoming. Why would Young be tracking his phone in Arizona?
Walt is known to drink exclusively Rainier, but in the bar scene with Vic (when she absentmindedly sips from his beer), he is drinking a Coors.