Do you trust the tour guide or not?

Yesterday was our preparation day which means it is also a day where we have some time to see the area. Five of the 10 missionaries in Iceland are new and the other 5 had not been to Gulfoss in the winter, so we decided to see Gulfoss and the other main sites on the Golden Circle.  We also decided only to do the trip if the sun was out.  When we got up I checked the weather forecast - a cold day with temperatures at the various sites at minus 17 C but even worse were the winds.  I checked out windchill factors and discovered we would be experiencing minus 10 F so I called all the missionaries and said dress for the temperature and windchill.  I planned to see Gulfoss (picture) when the sun would be it's highest and we got there as planned.  The only problem was the weather forecast was off considerably - the windchill was more in the area of minus 35 F.  Needless to say no one wanted to go on the hike down to the water falls as the wind was also blowing the water off the falls at us.  We went into the gift shop/cafe to warm up and ran into a friend who is a tour guide.  When we told him we were on our way to Þingvellir he said good as the winds are per the forecast over there and you can take the back road.  According to on-line road conditions it is impassable.  He said no it is open and you could even do it on summer tires.  So off we went in my Skoda and the Toyota van (the van only holds 9).  When we got to the back road the impassable sign had been moved off to the side and the road looked good.  About half way or 10 km the conditions got bad as the ruts were so deep you could bury the Skoda and the road had become one lane.  I drove one wheel on top the center ridge and one in the rut which seemed to work good for awhile and then the edge gave way and we plowed off the road.  All six young Elders were more than excited to push us out to no avail.  Finally we hooked up a rope and pulled us out.  The van has four wheel drive which helps.  We had a few more difficult looking places but we made the rest of the trip without incident.  As I asked - do you trust the tour guide?  What he failed to tell us was he was driving a four wheel drive jeep with 38 inch wheels.  When I saw him later he was shocked the road was bad and said the road must have blown in after he went by - a possibility considering the winds except we didn't notice any wind as we were working to get the car out.