If possible, I would have a friend/family member come over and look after the piggies. We usually have a friend who comes over and stays at our house.
I show her how to clean everything and leave detailed instructions behind. Make sure that you show the pet sitter
everything that you want to be done. The more specific, the better.
For example, instead of writing directions saying:
Please clean out the litter boxes-
Write something along the lines of-
I usually clean the litter boxes twice a day. Please empty the shavings in a garbage bag and spray the litter boxes with vinegar. Then add a 2-inch layer of shavings and three large handfuls of hay on top. Place the litter boxes back in the enclosure and throw the trash bag in the bin in the driveway.
Also-
Make sure the pet sitter adds tons of hay. Think about how many times each day you replace their hay. The pet sitter will probably come twice a day, right? If they come at 6:00 p.m., the amount of hay they put in has to last about fourteen hours. I usually ensure that enough hay is added by making bags of hay. Each bag has the same portion of hay. That way, I can say, "add four bags of hay," rather than leaving how much they add up to chance.
I hope this helps!