South By Southwest?

I am thinking of going to the festival in 2016, as part of a road trip from the UK. I have looked at the website and find it pretty confusing. Is it an event for civilians or for the industry? The site talks about buying expensive tickets to attend conferences, marketing lectures etc. I presume I wouldn't need that just to turn up and look for small venues, bars etc, to listen to some music and have a few beers, which is all I want. Do you pay to go to the small venues or do the artists manage on tips and CD sales? I presume there would be a number of acts each evening at the same site, I would be very happy to pay for that.

Sorry if this is all really basic stuff, but I am confused. Would you guys who have attended, recommend a trip? It sounds a lot of fun and a good way to look for new artists.
Thanks David