How to mount certain SD cards to a specific mountpoint in El Capitan?
The following two conditions must be met:


The mount point must already exist.
Spaces in the Label Name need to be escaped with an octal space character, e.g.: \040


As a test, I did the following:


Relabeled one of my FAT32 formatted SD Cards to NIKON D60 then ejected and removed it.
Created the /media/digicam directory using: sudo mkdir -p /media/digicam
Added LABEL=NIKON\040D60 /media/digicam msdos rw,auto 0 0 to: /etc/fstab


I then inserted the SD Card and it mounted as expected, it appeared in Finder as NIKON D60 and its Mount Point showed in Disk Utility as: /media/digicam