Hello Gabriel, I was always at Femundsmarka at the end of May and beginning of June. You just have to be lucky with the weather. In some years it was still icy and had snow. In other years, spring was radiantly beautiful. It all depends when spring arrives. Early June is good with fishing. The ice isn't long gone and the fish are hungry. It's also a good time before the mosquitoes come. You can find good places to camp in many places. You can also stay in one of the old open huts. Good luck on your trip to Femundsmarka. Ewald