Thanks all, yup I'll order the 6 Ft. probes... living in the land of 1 month summers & 11 months of tough sledding, I think I'll be looking at putting insulation on the outside in the future.. And reading about others putting insulation on & screwing it on, I kinda figured "what's one more hole",(no pun intended), of course that was before I got all your answers here.. now I just have to wait for it.. in the meantime, back to my little old wooden crapper style smoker, not fancy but it smokes..