Egilsstaðir Campsite is a good choice for everyone going through the East Iceland. There is a lot of amenities you can use and last but not least, there are the Nettó and Bónus supermarkets nearby, where you can fill your reserve.
How to find Egilsstaðir Camp:
In the south west part of the Egilsstaðir town, East Iceland
GPS coordinates of the Egilsstaðir campsite: 65.258018, -14.407825 Take me there!
Photos of the Egilsstaðir campsite: