I realise that it is very poor practice 'to assume,' but in this instance I'm assuming all tourers carry photocopies of relevant documents, as well as the originals while touring. Originals for obvious reasons - visa applications, embassy visits ect ect. Photocopies for control points, check points, police checks.
I don't know who else does it, but I laminate all my copies of documents. That way they can be shown to as many checkers as it takes to clear any given situation, plus they will never crease and become illegible.
Also, in this modern age of technology, I have scanned all documents, and saved them to a USB flash drive, in all common image formats, i.e. jpg, gif, tif, tga, wmf, bmp, pct, pcd. I know that should I loose my documents, I will have a means of proving my identity by whatever computer image package is available at whichever location.
It's also a good idea to keep all additional medical, personal and contact details on the flash card.
p.s I don't take a laptop with me when touring. I try to remove myself from the rat race as much as possible.