We had to abort our tour of Iceland before it even really started. We made it just to just outside the airport: while cutting through a zip-tie with a knife (removing the transport protection from the bike) I cut my hand so deep that it had to be stitched and plastered for about week... and no cycling for 2 to 3 weeks. So we were back home after 2 days ;-(
We planned to cycle for 4 weeks and were not able/ready/willing to visit the country otherwise. As others have mentioned: if the touring is no longer fun, we go home or do something else...
Tom