Hi! Re: the whole license plate thing - Ive gone on vacation many times in a rental car and when they ask for the plates, Ive said, I dont know, its a blue toyota and they were fine with that. Do that and give them cash for the room- no record of you!
Given that jp was so cheap, he may have taken the boys there for breakfast other mornings, as well. A canvas of other area hotels, soon after Susan went missing, may have shown that he was at several of them with the boys, for breakfast, at various times. IMHO
The location of this place does bolster a theory several of us had that jp went south and then turned onto 6W into the desert. This hotel is accessible to both I-15 and Redwood Rd.