In reply to bharryb:
To ascent Galdhøpiggen there are two main routes.
From Spiterstulen (at 1100 m, road here wil be open in May) it is 1400 meter elevation on non technical, but continuous steep walking in snow. No glacier. Crampons will not be necessary.
From Juvasshytta (at 1850 m, road opens normally in mid May) it is 600 meter elevation to the top. Easy walking first, the crossing of a flat glacier, with few crevasses. In May these should be covered with much snow. From the other side of the glacier it is steep, but easy scrambling to the top. Even in the end of May there will be guided trips across the glacier, if you prefer this.