We did not find it scary at all, just a great road that was definitely the loneliest road we had ever driven. When you drive 45 minutes and never see another vehicle in either direction, which happened a number of times, you are out in the boonies to be sure.
The road itself was fine though a decent shoulder was a rare event indeed. Don't expect much in the way of amenities at either Eureka or Austin and drive on the top half of the tank unless you have a very large tank. Cell coverage is spotty at best and can easily disappear with no warning.
Outside of Austin we pulled onto the shoulder to consult our GPS for campgrounds and the rapping knuckles on my window that startled me belonged to the Nevada Highway Patrol Officer who had stopped just to make sure we were alright. I thanked him profusely for his concern and he recommended a campground we had had passed by and ultimately returned to for a nice nights stay.
If you are properly prepared and equipped 50 will hold no terror... if not you probably should find a new hobby. :B