Spare mags, hell! I've just about figured out how to conceal two automatics w/ reloads... for Florida!
I carry a 1911A1 w/ 2 spare 10 round wilson rogers extended mags in a IWB rig from Ted Blocker and a small S&W 317 TiLite .22 caliber snub revolver in an ankle rig that has a small pouch my parachute rigger modified for me to carry a small box of 50 spare cci stingers I modified with a Paco Kelly tool.
My backup may not be big but it is many....:o)
Stay safe !!