Hey no derail at all, I'm enjoying seeing the pictures of your frogs/setup.
The cricket bowl fits on the rock mass, I'm not sure if the pictures show how large that rock is, but it's a decent size. The fruit flies that do escape the feeding bowl have been walking around the vines. I've personally seen a few of the frogs eat fruit flies now, so they are eating and doing well. They're extremely fast when they want to be, so it's been hard for me to catch them doing this, but I've seen a few jump in the water already, and none of them had any problems getting out. One actually climbed up the glass wall without using any vines or perch. I'm feeling a lot more confident about this setup.