Not in the pump brigade so can’t offer any experience, I use CGMs and had those fall off during holidays due to showering, being sweaty and swimming! Oh and walking into door frames!
Will the sensor be any use without the pump? Just to save you the finger sticks?
Local pharmacy to acquire some patches or whatever to keep your devices in place?
I still remember the first few times I swam wearing a CGM, I was constantly scanning the bottom of the pool as I was convinced the little ‘lift button’ would fall off.
Hoping you find a work around so you can enjoy the rest of your holiday.