Re: Single most costly.
Gentlemen, just a word to the wise if your bus gets stuck... and yyou don't have Good Sams RV towing. Go to (hitch hike) to the nearest truck stop where there are a lot of over the road truckers parked, and ask any owner-operator if they would be interested in making 1 or 2 hundred dollars to pull your bus onto solid ground. Most flat bed drivers carry 10 to 20 chains and would be glad to help you. Depending on the distance, many won't even charge you a cent. I know this from over 40 years of truck driving experience. And don't be afraid to flag one down, otherwise they may think you've got towing insurance and are just waiting on a wrecker to arrive.