I was playing as an orc barbarian, and I had gotten all of the map fragments over the course of being level 13 to 19 without too much difficulty, but when I went to the fortress at level 19, the Truesilver golem completely destroyed me. I had Rolf's axe and shield, along with a reasonable Str of 29, so I'm wondering, what is a good level to visit Rolf?

Also, two smaller questions along the same vein? What is special about truesilver and is there any way to get the random map fragment without worrying that some random monster across the map will fall into a trap and generate the fragment without you knowing?