Replying to Thinking about trying downhill

This is my first year of mountain biking and I have a Specialized Hardrock Sport Disc.  I live in Ohio so I decided to get an entry level XC bike because there wouldnt be any real downhill around me.  But, I found out about a place like 45 min away with like 5 or so different runs varying in difficulty.  I wouldnt need a different bike would I just for trying it out?  I mean if I get really into it, eventually I will get a  new bike but I still want this one for XC.  Also, would I need a full face helmet or shinguards or any other type of pads?  And I have clipless on my bike, would I want to use them or put the flat pedals back on?