I have to read and study many things, then review the results from others, too. Sometimes that interferes with camping time.
I use Evernote to store and sync info between laptops smartphone and tablet. Use offline sync of certain folders, to be reviewed on the tablet with >5hrs battery life.
Get a 10" tablet, which gives lots of viewing space. Add a bluetooth keyboard for frequent typing (I confess I don't always use)
Sitting outside in the sun makes the task not so inconvenient, and tablets can often be charged while driving toad or rv.
Also do not forget that printed pages are easy to take notes, carry with you, and use very little battery once printed :-)
