Tagging of bridge was clearly outlined in the article you purported to have read. The switch only needs the managment/trusted vlan tagged to the bridge, logically all the other vlans are simply flowing through the switch from ether1 (lets say trunk in) and out the various ports as assigned. Literacy is not our issue.
ROUTER:
Purple Trunk. These need IP Services (L3), so add Bridge as member
add bridge=BR1 tagged=BR1,ether2,ether3,ether4,ether5,ether6,ether7,sfp1 vlan-ids=10
add bridge=BR1 tagged=BR1,ether2,ether3,ether4,ether5,ether6,ether7,sfp1 vlan-ids=20
add bridge=BR1 tagged=BR1,ether2,ether3,ether4,ether5,ether6,ether7,sfp1 vlan-ids=30
add bridge=BR1 **tagged=BR1,**ether2,ether3,ether4,ether5,ether6,ether7,sfp1 vlan-ids=99
SWITCH
add bridge=BR1 tagged=sfp1,sfp2 vlan-ids=10
add bridge=BR1 tagged=sfp1,sfp2 vlan-ids=20
add bridge=BR1 tagged=sfp1,sfp2 vlan-ids=30
add bridge=BR1 tagged=BR1,sfp1,sfp2 vlan-ids=99
Understanding how the bridge vlan operates.........