Its allways possible to recover old files from a disk.
disks arent really vurnable to water spillage unless there was a big shock.
You can read disks via USB. just screw open your laptop take the disk out and plug it in a HDD USB reader like this one:
There are variations on sata to usb readers but most of them are fine and will cost you around 10-20 bucks.
I hope i helped you with this.