Here are web pages for some hotels if you are interested:
Hotels in Korpudalur:
www.korpudalur.is/main.htm
uk.visiticeland.com/accommodation/view/guesthouse-korpudalur
Hotels in Myvatn:
www.tripadvisor.com/SmartDeals-g315845-Myvatn-Hotel-Deals.html
directrooms.com/iceland/hotels/myvatn-hotels/price1.htm