324 is a back back road that you take off of 10 to the north. Looks like you are turning into a pasture but the road is really good. Since you should be coming from west do take 155. If you miss that hwy, continue east to 324. You will end up in same place.
And if you have the time, back track to Dardnell and pick up 22 west to Mt Magazine. Breath taking views. I suggest not taking tt on this trip.
My bad, that is exactly the route we take. I was typing for my husband and did not look at the map right. We do go past the 155 turn off of 10 because it is not so good of a road. We travel on to 324 then go up to 155 then to 154. Sorry you are exactly right!!