[Mayson]

An 815 credit score is not that uncommon. It is rather easy to obtain 815 score profiles by targeting the richest zip codes and filtering results to older people who own properties in the said zip codes. In the overwhelming majority of cases, the scores filtered by the above parameters will yield 800+ scores. I know this doesn't necessarily help your case, but it should provide you with some relief in the event you screw up this particular profile.
Now with that said, you can always utilize your profile (selectively) for loans/merchant accounts, etc. OR, given your proximity, you could perhaps sign up for CCs and have them mailed to their address in the general window of time when they're on a vacation, and you can pick them up in person. This is a rather simple process that generally doesn't require any complex authentication (besides maybe a set of typical KYC random questions) if the mail-to address is long established on the person's credit report and background report. You can use Google Maps to view their residence and assess the accessibility of the mailbox to outsiders, while relying on social media to establish the timing. I'm just throwing some unsophisticated method out for you. There are others that I'm not willing to share, obviously, but this is just the nature of this field.
Good luck.