>>2803536F26 requires a bunch of river fording if you absolutely insist on driving it.
>>2803231 (OP)Golden circle is stunning, but be prepared for literal boatloads of tourists getting bussed in from the cruise ships. The entire country has beautiful sights worth seeing. You can go for a drive anywhere and just follow any of the landmark signs and you'll see something amazing.
Don't feel that you need to do the ring road. Pick 1 or 2 places as a base and stay there for a while and do things in the surrounding area.
Gas stations are everywhere, other services not so much.