Yes, I know. I first visited it in 1996 and, of course, the fencing was up.
When my husband ws\as young, in the late 50’s-early 60’s, he said you could go right up to the stones. When I first visited in 1983, they were roped off but, you could get quite close. Haven’t gone there in years.
I feel honored to have been lucky enough to walk up to the stones and touch them to my heart's content...
No fencing.
1988(?)
I went in 2013 and again in 2015. If you’re willing to spend the money, there are 4 package tours a day, Stonehenge, Bath and the village of Laycock. They visit Stonehenge before the monument opens and after it closes (two tours each) and you get to go among the stones. They don’t let you even touch them, though. I thought it was worth it.