DR scenario

[dweberwr]

In this scenario would I be able to use a crossover cable with both dss boxes for an initial sync (several TB worth of data)at my main location and then move the secondary device to my remote location?

[To-M]

That is the best way to do it - sister them next to each other then deploy and reconnect.

[Gr-R]

As long as the setup remains exactly the same, you should not have any issue.

IP
WAN option
RepID

should all be identical before and after move.

[dweberwr]

Does the procedure change at all if it is done over the WAN but via VPN?

[Gr-R]

Does the procedure change at all if it is done over the WAN but via VPN?

via vpn, you shouldnt need to use the wan option.