Please keep this site on your top #10 places to visit in Hilo.
It cost $12 to enter the park; it is a multi-day pass if you miss anything or if you want to drive/ hike many pathways.
The vog, heat and sulfur beds are quite an experience.
I went alone on the Hilo public transit for $2.00 (Hele On Transit; limited stop times, see online). But when I was up there, I was NOT alone--
There were several families and friendships trailing the pathways with me. Therefore, I was not alone, nor lost.
It was a great feeling!