Traction boards for a bus?

[Summer]

Hi all,
We've got a 26 ft shuttle bus with rear drive and duallys (not sure if I'm spelling/saying that right) on the back.  We'd like to get traction boards (think that's the right term?) or something like that to keep with us in case we get stuck, but are not sure if we need a particular kind, if some are better than others, how many we need, etc. Any wisdom/recommendations you want to share? I tried asking on a bus forum but nobody seemed to have much knowledge on the subject.

 

[highdesertranger]

I would go with a locking rear axle first off. What kind of vehicle is that? Highdesertranger

 

[Summer]

I’m not sure what that is but I’m guessing Amy will; I’ll pass it on to her.

It’s a 1997 international Chevy. (I’m having a late night moment and not sure I’m saying that right all of a sudden.) It used to be a shuttle bus for Princess Cruise Lines in its first life.  We made a video about it here: