How old and big is your pacman? If its an adult if you give him a nice meal before you go and you have lights, heat and humidity on timers you should be ok. Even if its a subadult if you feed a nice meal he should be ok but if its a baby im not a hundred percent sure a week would be ok. Again if you could get some one to check and throw in some crickets or even a worm that would be your best option. A subadult could go a week but something in between wouldn't hurt. And another thing you have to take into consideration is you are going to need someone to see if there is any poop or waste to pick up and even putting bigger dishes for water what if one of your frogs decides to poop in it? you will need someone to change the water.