I wouldn't drive up there myself, especially at night.

Why?

Well, unless you're used to being at 14,000 ft you or someone in your party may get altitude sickness. Didn't bother me, but the tour guides carry oxygen just in case.

The Saddle Road is narrow & paved up until about 10,000 ft. There is a small rest station (I think that's what it is). Most tour operators stop there for an hour or so to acclimate the passengers & to feed them.

After that point the road is dirt & considerably narrower. Even with our experienced driver I was really nervous getting up to the telescopes.

It's REALLY COLD AND WINDY UP THERE. The tour operators provide you with warm jackets with hoods and gloves. I had pants, socks & a sweatshirt in addition to the parka & was still cold.

The altitude didn't bother me, but it seems like you're in slow motion at 14,000 ft. Moving is difficult.

I also wouldn't do the drive from Hilo - too far.

I have to tell you I was thrilled to be back down at sea level. The altitude does take it's toll on you. I was very tired & hungry AND I have low blood pressure, which makes it easier for me to go up in altitude.

Would I do it again? No. Unless you're REALLY into astronomy & want to see inside of one or two of those huge telescopes AND/OR see the moonscape up there I didn't find this trip particularly interesting.

Definitely take a tour if you want to go up.

Mary