Hai Jennifer, I keep mine always with water around (4 to 5 cm) and a wall of stones in the back in which they hide. Outside of the breeding season you don't actually get to see them much. And yest the juveniles can be kind of Speedy Gonzalez when they are disturbed.
To my opinion this species is less hardy then H. dunni , so if it works out well with these guys ... you shoudl not get a problem with H. dunni for example.
I feed mine worms and fly maggots and they do well on this. Have not tried crickets. When kept cool and much food offered during this fall you will almost see them grow !