dhcp snooping - ip source guard

Dear All,

I,m trying to configure dhcp snooping & IP source guard for my network which
is 5 access switches, BBsw1, MS DHCP server,
also I applied vlan per switch vlan range is 10 , 20 , 30 , 40 , 50 and vlan
60 for switches management . dhcp server IP 10.1.1.1/24
I configured all switches as follows
Switch(config)# ip dhcp snooping
Switch(config)# ip dhcp snooping vlan 10 20
Switch(config)# interface range fa0/24
Switch(config-if)# switchport trunk encapsulation dot1q
Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport trunk native vlan (10(20)(30).....
Switch(config-if)# switchport trunk allowed vlan 60
Switch(config-if)# no ip dhcp snooping trust
Switch(config-if)# ip verify source vlan dhcp-snooping

what should be the best configuration for my scenario

-- 
Best Regards,
Mahmoud Eldeeb
Blogs and organic groups at http://www.ccie.net