[Grill]
Yes. Czernov ripped it to escape from hell, before he deadtimed.
[Lake]
Charity leads Nadas to the boathouse, where she puts on a life jacket and offers him one, and then steps into the paddleboat.
It shouldn't get him too wet. If there were a dock on the island (which there isn't), then it would be possible to avoid getting wet at all.