If an organiosor is made liable for incidents this whole thing will fizzle out.
All we are doing is creating an environment in which to meet and ride together.
Summed up nicely

On the trip planning threads there is usually a lot of banter, what booze to take, who shares a tent with who, etc., it would not cost anyone anything, or place assumed liability on anyone, to post tips on some of the "rescue" things to consider, like contact numbers of rescue services and hospitals on or close to the route, who on the ride is medically trained, what to pack in your personal medic kit (apart from your favorite drink), and so forth.
Also to highlight the remoteness and possible risks (a bit nanny style, but lessens the "I did not know there is no cell phone signal there" type of crap)
This will definitely assist the newbies, and a number of seasoned riders too.
Also, for most "extreme" sports, it does not harm anyone to go for basic first aid training, for yourself and your potential riding buddies.
It is also not very expensive, and could be done to supplement tech days and how-to-fix-punctures days.
Always be prepared to take responsibility for yourself!