Rebuilding website on temporary domain

We are rebuilding our complete website including Membership 2 for our domain. Our current live website is https://www.dgoc.nl. Our temporary domain is http://dgoc.nl.transurl.nl/. We are now at the point that we want to install WPMU Dev and the plugins we use.

How should we handle this to make sure that all will work well when we go live on regular domain?

Thanks!