Hyper-V/SCVMM 2012 VLAN ID's not working

I am having issues getting multiple VLAN's set up on my Hyper-V cluster. Here is the scenario; I need to have 2 separate (potentially more in the future) VLAN's to span across the Hyper-V environment. So far I have set up a trunk to the Hyper-V hosts on the switch side of things. Here is what the trunk config looks like;

interface GigabitEthernet1/0/20
 description TEST
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 10
 switchport trunk allowed vlan 5,10
 switchport mode trunk

Now, on the Hyper-V side of things I have created identical virtual switches across all hosts, named "Inside".

I have created the logical network for this "Inside" vSwitch, set up the VLAN's on the logical network and built the IP pools for each. I will gladly post the configuration if that helps at all.

This is where the issue arises. If I leave the VM NIC's untagged (no VLAN ID), they all seem to work fine, and connect to the VLAN 10 network like they should. Once I tag the NIC then traffic to either the VLAN 5 or 10 networks seemingly will not pass over the network as I cannot even ping the gateway for each of these. I have tried both static and dynamic addresses for the VLAN ID tagged traffic, no help.

Here is an illustration of what works.

And what does not work.

Where should I be looking? There has to be something I am overlooking here, it seems like this would be a very common setup, but I feel like I may have been looking at this for too long.