@comet424 the VLAN tutorial does work, but HA as changed a bit, mostly how you connect to ssh, so I recently updated the tutorial to reflect these changes. You can check it out in this same thread down here: Setup VLAN and HA tutorial 
If you find time to read the complete thread, you’ll find several opinions, network designs and ways to segregate your network. I suggest also checking out this other thread where vlanning on HA is also discussed: HA on different VLAN?
Very informative reading 