Insulin Pump

Hi! I have have only been on the insulin pump for 3 weeks now. i have the Medtronic Mini Med pump. I was wondering what any of you guys that are on the pump do when you wear dresses or skirts. I have a leg strap that I have tried wearing with skirts, but it doesn’t stay up. With loose fitting skirts and dresses I have just worn a think pair of shorts under it and hooked my pump to them. But I dont know what to do when I wear something that fits tighter. Any suggestions?