I identify with the OP --- I know how to do this, and have done it when I was younger, but I (too) just don't want to do it anymore. On the other hand, I always get nervous when I hire someone to do such a critically important task like this.
I suggest you check your hub temperatures with an IR gun after they are re-packed. We got into TT'ing 3 years ago and I had my tire shop pack the bearings at the next season. They ran waaay too hot right out of the shop, and long story short, I found out they thought the castle nut is supposed to be at 50 ft lbs torque. It is supposed to be finger tight.
Now, I take the hubs off and deliver them to that shop for the dirty work of cleaning and packing, and then I install them so I know the bearings are set correctly.
Just a suggestion.