The mountains I climb nearby can have the trails erased or dramatically altered by rainfall. The marked route can become dangerous when going slightly off trail can be entirely safe.
We also don't have "foliage" in Iceland :)
We also don't have "foliage" in Iceland :)
From my limited experience with Iceland's terrain I think I'd be worried about "newcomers" behind me losing the trail so I think I'd be even more wary but perhaps it depends on the group, equipment, etc. While there isn't much dense foliage out here in the Rocky Mountains I've seen many people get separated even in alpine terrain. Especially in boulder fields where groups routinely get separated and I've seen several called for rescue independently after searching for hours.