this is what I did, and I am no expert, just saying...

I have my UTH controlled like you, probe between the glass and the UTH.

I have 2 more probes, I on each side of the hide, which tells me the temp right at the opening where the snake enters the hide. then I have the probes attached to the top side of inside the hide, so I know what the temp is in each hide, and also what the temp is on each side of the tank along with the temp of the UTH.

I am pretty sure this is pretty redundant however I like to see what the temps are all around the tank. my thermometer of choice is the accurite000891 I believe. shows 2 temps ( in and out) and it also shows the humidity.

hope this helps you!