ESP32-WROOM-32 hardware recommendation on milled board

[mega128]

Hi all,

I am using a single layered milled PCB and I read somewhere that stray capacitance on a CNC milled board can be more that an etched board. My question is how do I measure the stray capacitance on my boards and what is a benchmark of production board I need to match with? should I use a 100nf and 100uf cap next to 3.3V and GND pins on a milled board? BTW I plan to use 2 AAA Energizer Ultimate Lithium batteries and the ESP32 will mostly be in deep sleep and wake up after few hours and read wifi temperature and go back to sleep.

Thanks in advance for expert advice!