When I do a long smoke I normally put on 3 to 4 fist size chunks, usually 1 part hickory and the rest fruit. On shorter smokes or poultry usually just 1 good sized chunk will do.
I just arrange them around the outside of the basket and let it go.
I have used both lump and kingsford and actually prefer the briquettes for long smokes, just seems the temps are more stable for longer.
BabyGotBack BBQ team
Uber fast stealth black thermapen
Cubby blue Thermapen
22.5" weber X 2