Sounds good to me. What you don't want is for it to wait until over 230*F and then finally kick in. As you know, fan clutch engagement is a function of the temperature of the air through the stack (which means outside plus heat from the stack), engine speed, and time (it's a little slow to engage, then a little slow to disengage). With all of that, there's variability.
I have an auxiliary radiator (from engineer837 in the Peoria, AZ area), but mine behaves similarly to yours. It usually comes on between 210*F and 215*F, usually only on long, hot grades. It then drops to somewhere below 190*F (maybe even low 180's once in awhile). BTW, I strongly suggest an auxiliary radiator for all LLYs.
2004.5 Silverado 3500 SRW 4x4, D/A (LLY), Ext. Cab, Long Bed
engineer837 aux rad, TxC CAI, LBZ MP, Scangauge II, Nicktane aux filter head, KD lift pump, 2008 PS pump, 2011 hydroboost, Frederico Swaybars, Rancho 9000XL, Torklift StableLoads, BFG AT/KO2, Lance 835 Camper often in the bed.