Note: I have put this page in what I believe as order of importance.
https://www.scouting.org/training/youth-protection/
The best legal protection is to not need it. If an accident does happen, the second best legal protection happens if you followed all the rules in the guide to safe scouting.
https://www.scouting.org/health-and-safety/gss/
Is this more important than the Guide to Safe Scouting, perhaps. One of the greatest resources we have in Scouting is the training. I know some people say that their trained patch should say "Over trained". There is a lot, but so worth your time.
Get First Aid/CPR/AED Training - I tell the scouts, at some point in your life there is a good chance you will be called upon in an emergency. Chances are, it will be a loved one that needs your help. At that moment all the training you have had may not seem like enough.
Get Wilderness First Aid Training (A bit more expensive and time consuming -ff we do this as a group, we can probably get a deal.)
Youth Protection Training
https://www.scouting.org/training/adult/ - "variety of materials, from quick references to complete courses "
Online Training - There is so much more here than Youth Protection Training. Did you know there is online training on defensive driving? For some activities we will require additional training, Climb On Safely for example.
Health and Safety Forms - Has the Activity and Consent form, and many other forms.
Guide to Safe Scouting - Checklists - IMPORTANT set of checklists! BE PREPARED
Those that have worked with me in the past know that I don't always do a consent form. In a meeting with an Incident Management employee of the LDS church I was told that there is no legal protection that comes with consent forms, they are simply a way to make sure that I know parents are informed of what we are doing. Despite that statement, expect consent forms for adventurous activities.
About consent forms BSA states, "Required for BSA aviation flights and recommended for all activities ."
https://filestore.scouting.org/filestore/pdf/19-673.pdf
Some time ago tour plans were eliminated. see this FAQ for some good information. Reading between the lines my belief is, there was no legal protection with the Tour Plans and they were consuming peoples time and council resources, since they had to be turned in and approved. I believe legal protection comes from 1) Education of Safety guidelines 2) Rule following. Lawyers don't care about what you didn't know, it really comes down to what did you do.
In the climbing community in scouting we are acutely aware of the potential for harm. One of the reassuring reasons for this is the General Liability Insurance that the Scouts provide. Many in the climbing community are unwilling to be a resource to the LDS church because it does not provide this resource. See Safety, Insurance, and Liability Issues for Church Volunteers.