I have a 3750 stack which is my core switch that all servers are connected too. I have 8 Vlans that I have created on the core switch and 9 edge switches that I have created the vlans on too. I haven't added the uplink ports to the core switch to the Vlans yet. My questions how I setup the ports on the core switch for so that all users will have access to the different servers on the core switch.
If you are using the ip-helper function then you must have a DHCP server with the scopes on it. Just make sure that for each scope you set the correct default-gateway
vlan 50 = 192.168.50.1
vlan 60 = 192.168.60.1
vlan 70 = 192.168.70.1
vlan 80 = 192.168.80.1
and obviously exclude the .1 address from each subnet from the scope.