I can't stand crickets. They are the reason I told myself I would never keep another insect eater again. I then found dubia roaches. They are an amazing feeder that I'd recommend to anyone. Every last one of my geckos eats them like they are going out of style.

I dust a bunch of them at once and pour around 10 or more in little individual glass tea candle holders. It keeps them from crawling out and the geckos can still see the movement through the glass. If they do somehow get out they will not try to munch on your gecko like crickets do. They have been a life saver. I highly recommend them.

Mealworms have a hard exoskeleton, some people may be afraid of impaction from their hard shell, but I don't think cresties eat enough insects to be afraid of it. Still, why risk it?