--How many dives are planned? Is it worth it to drag the scuba gear along for just two dives?
Yes it is. I've been travelling frequently on business trips over the last 8 years. The peace of mind knowing it's my own equipment is invaluable to me.
I've been known to pack an extra bag including my drysuit when going to places where I might get only two dives in due to time constraints. Last time I was in Halifax, Nova Scotia, it was May and the sea temp was 33 F. No way I was going to dive in a rental wetsuit in those temps. Over the course of two dives I saw schooling pollock, lobsters, moon shells and my first ever wolf eel (despite diving wolf eel heaven aka Vancouver Island and seeing not-a-one).
It was worth the expense and effort.
*edit* To answer the OP, yes I bring my own equipment to a dive resort, for all the reasons previously stated.