If you plan on hiking towards the waterfall, take the service road on the right when you are driving on Vantage Road SW. I'm not exactly sure where the road on the left takes you, but I believe it's for people who want to climb.
It's an easy grade for the two miles in, and two miles out. With the right shoes, gear, or if you are sure footed and confident, then you'll be able to do a baby scramble towards the base of the falls. Going up was easy, but going down was a little nerve-racking.