For us, as we stayed in Tune Hotel, we just went to the Riverside Hotel concierge and book our bus tickets to get here. It's RM10/way and RM45 for admission fees. These shuttle bus runs every few hours, so it's best to find out what time to go...
As Sarawak is made up of many different indigenous tribes, the SCV showcases all of their attributes in one location. Pretty nifty in that it saves you time from laking those long boats and visiting the real deal... although this would come close.
There are 2 live shows that are staged at the auditorium @ 1130 and 1630H. These are free, and you shouldn't miss them at all. Heck, even the people in SCV will shoo you to head towards to auditorium! :)
And that's next, the stage performance.