We are thinking of Iceland in the summer of 2020 and will most likely do a guided hiking/adventure tour with a company like REI Adventures or similar. So we will not have a choice of lodging, and will not be able to self-cater. I have been reading up on Iceland, particularly culture and customs. It seems like the diet there is quite limited as far as fruits and vegetables, and consists mainly of seafood and lamb, bread, and dairy (their excellent skyr, as well as local cheese). And then there are some local specialties like fermented shark meat, whale meat, and smoked puffin, all of which I would avoid like the plague.
I love seafood and could happily eat that every day, especially if it as fresh as Icelandic seafood. But I do not care for lamb at all (I managed to eat well in New Zealand for three weeks without every touching it). Beef and chicken are OK, but apparently very expensive (even more so than other food) and may not be offered on a tour. The biggest problem is I am gluten- and lactose-intolerant, although I can get by the latter with Lactaid pills. But my diet relies heavily on fruits (citrus, berries, pineapple, but not apples), nuts, and vegetables in addition to the seafood and meat.
Of course I can (and usually do when traveling) carry a supply of nuts and energy bars to fill my tummy at lunch, but my husband and I like to dine well, especially at dinner. We are prepared for the high price of wine there, but will we be able to enjoy our dinners?