A friend on the outside could then use the geolocation data from the analocator and drone deliver supplies at night. The contestants turn the camera off at night and the secret delivery wouldn’t have to be anything overt that would be easily noticeable post-delivery.
Contestants are allowed to bring ten items to the location with them. Part of the show is deciding which items to bring and which items to go without - skipping a fire starter or a water bottle, for example. But this way they could drone deliver a few of those small items they skipped out on.
I’m talking about this show, for anyone unfamiliar: Alone - Wikipedia
They do regular health check-ins with the contestants, and if you’re not losing weight but there’s no footage of you catching food, they’re going to figure out pretty quickly that something’s up.
On top of that, the locations are chosen so that just hiking out to you with food would be a survival challenge in itself - and coming in by boat would almost certainly be noticed.
Interestingly, I’ve just been binge watching the show for the first time. I’m on season 5 currently.