Removal of the bearing saver will expose the split pin and castle nut.
Remove these and the drum should pull off by hand.
This photo shows my brake shoes. I changed them recently and they have only been in salt water twice.
I must look into these brake flush kits that i've heard about in the club.
The block at the top of the plate, between the shoes is the adjuster.
You will find a Bolt head at the rear of the plate.
If you screw this in, it pulls a wedge between the shoes and opens them up.
If you unscrew it a few turns and knock it in towards the backplate, it will release the pressure off the shoes to ease Drum removal.