Roger Parkinson did a nice blog on how to setup the Kie Server 6.2.Beta version to play with.
This is still under development (hence Beta) and we are working on improving both setup and features before final, but following his blog steps you can easily setup your environment to play with it.
Only one clarification: while the workbench can connect and manage/provision to multiple remote kie-servers, they are designed to work independently and one can use REST services exclusively to manage/provision the kie-server. In this case, it is not necessary to use the workbench.
Here are a few test cases showing off how to use the client API (a helper wrapper around the REST calls) in case you wanna try: