Iceland Unlimited <http://www.icelandunlimited.is> is a wonderful travel and tour company in Reykjavik. Though they serve all travelers with all sorts of tours within Iceland, they are particularly knowledgeable about the needs of wheelchair users.
Jon Gunnar is the Iceland Unlimited CEO, and he can help select a wheelchair-accessible hotel and will carefully and personally help you plan your itinerary within Iceland.
For a Golden Circle tour, a wheelchair user and 3 others were the only passengers in a jeep driven by a knowledgeable and capable guide--a true Renaissance man--who was well-versed in assisting wheelchair users.
On another day, Jon Gunnar's delightful associate, Alicja, arranged a tour to the Blue Lagoon, which is completely wheelchair-accessible. The Blue Lagoon staff are helpful and trained to assist wheelchair users. Iceland Unlimited can arrange the trip, and payment is covered with a voucher.
Jon Gunnar's expertise, including that of the needs of wheelchair-users, is indispensable. Iceland Unlimited is an ideal tour company for families, groups, or individuals with or without disabilities! Highly recommended!