If you do not use any replication (mirroring) techniques I fear that restoring the VMs from a backup - not from a replicated clone managed by VMware Site Recovery Manager can be quite tedious if you have many virtual machines. You'd have to restore them and then register them on your ESXi hosts one-by-one in your clusters.
The reason why I asked you how far apart are the Data Centers is if you would eventually consider investing in either a storage array that supports mirroring (for example NetApp) or do it via software with VMware vSphere Replication: Efficient Virtual Machine Replication | United States for a proper DR plan - if the connection between these two could handle 30minute-1hour windows. depends on how your metric like Time To Recover and Time To Repair are defined by the application owners.
If you'd like to try Site Recovery Manager in a cloud-based lab environment, use VMware Hands-On Labs that can be found at this site VMware - NEE - look for lab HOL-SDC-1405 - IT Outcomes – High Availability and Resilient Infrastructure and give it a shot.
There are many aspects of DR - ask away if you'd like ![]()