I use a foiled 12" terra cotta flower pot base in my WSM water pan and foil over the top of that, leaving an indention to catch drips. Pull the top layer of foil and rewrap. Good to go for the next LNS cook.
I do cook chicken without the water pan, and it always comes out great.
Traeger Lil' Tex Elite, WSM, Green SS Performer, 22" OTG, hyperfast orange Thermapen. CBJ.