Hi,you have a very cute little froggie there and thank you
errm to be honest I've never heard of a feeding tray I put the crickets in at night time and let the two of mine hunt them like they would in the wild and to be pretty honest I'm sure your little frog will find them just fine
my two are totally different milky comes out in the day if I give them a real good spray where as moo doesn't really move during the day just sits in the leaves but both get active at night around 9 o'clock but I think it may just depend on the frog so don't worry about the timings that lumpy come out at night

hope I helped if you need any other help feel free to just pm
frogmadmeg