for the rewards, [camp glory] gives 3 type of medicines, one made enemy go crazy (still have no idea what's it do maybe increase enmity) one gives 155 hp for 10 mins, one reduce enmity (used on raid boss from flashing red to red). and crystals...
I joined like 5 battles. One of them dropped 3 +3 armors R35ish.
It's pretty fun. Too bad the general public still have no idea there is such event existed...