I have a fussy edulis. Give it another day or 2.
Also try to invest in a timer and a mister for when you're on vacation.
If not, try to find a friend or sitter that you can write a care sheet for or that can keep the tanks humid.
It will help avoid problems like this.
When mine doesn't eat for an excessive amount of time I put him in a honey bath.
Just fill a tuppaware with bottled mountain spring water and a littllllle drop or 2 of organic honey
and plop them in. It'll provide a sugar rush and might get their appetite going again. Leave them in for a half hr to an hour.
After, let them get situated again and if you want, try to feed assisted later or next day w/tongs. It usually works. If not, don't panic.
Your vacation may have just screwed up their system temporarily, if they had a strict routine with their lights, temperatures, and humidity.
If another 2-4 days pass and they still don't eat, schedule a vet appointment.