Never used KBB in any of my WSMs.
Wind screen and a dry pan or sand in the pan would probably improve your fuel mileage. It takes a lot of energy to keep that water hot.
My Boys: Joseph (EI); Andrew (EE); Daniel (EE)
My Toys: 10 WSMs (B, C, DH, DA, EZ, DZ, EO, DU, DR, EE/DU mutt); Brinkman Cimmaron; Chuckwagon Cooker; 5 22.5" Bar-B-Q-Kettles; 1 18.5" Bar-B-Q-Kettle; 3 WGAs (EZ, DE, N); 3 SJPs (DT, DR, DR); 2 Smokey Joes (A, K); Genesis Silver C (DU).
"For when democracy becomes tyranny, those of us with rifles still get to vote"