Is it ok to disconnect my pump for longer than normal periods of time?

I wear an insulin pump and I was wondering if it is ok to disconnect it for longer periods of time when I wear some dresses? Right now I can only choose dresses that I can wear a bra with or something loose so i can wear spanx to hold it in place but there are times when I want to wear a bra-less tight dress but I have nowhere to put it. I am just worried about how to keep my blood sugars ok or if that's even a good idea and its just one more thing to sacrifice?