You really really don't have ANYONE to throw some veggies/crix in his viv a few times while you are gone?
When I left last time, I took some plastic cups and threw in some crickets with a little veg to eat and a piece of egg crate. I covered each cup with the press-n-seal wrap and poked holes in them. I laid out a cup for each day, and stored them on their side so the crix could have somewhere to move around. I chopped up plenty of veg to last for each day. The person I had watching Blaze didn't want to mess with the crix, so all she had to do was throw in a pinch (she was younger) of veg and open a cup of crix and shake it out. No fiddling, chasing, catching or otherwise screwing around with the buggers. Worked out well.. She picked up the poo with napkins and wipes for me, though. That was nice of her. All I had to do was remove the old veg and pieces of egg crate when I got back home.
Thankfully, now, I volunteer for a great animal sanctuary and I can bring them out there next time I go away for a while.