you will have no issues then.
We have 1 checked suitcase devoted to our snorkeling stuff including a weight belt, tent, free diving fins... It really is not that much extra room if just mask, pipe and fins. We use dish detergent in a small bottle to defog. It is so much nicer to have your own. I gave up nice shoes and nice clothes years ago to make room.
Yes, age thing is started to affect some bookings so we just lie now.