Going on vacation in May. Will Carefresh be okay for a week?

I keep my piggies on washable pads, I dont like using carefresh. I will be going on vacation for a week in May/June and my Pet Sitter will be feeding them/watering them. I do not want them to have to worry about doing full cage changes. Only spot cleaning. Usually with the cage liners, I change every day/every other day. Will my 4 boys be okay on carefresh for a week?

But they also be OK with plastic hide houses ? I have fabric ones, but I can’t don’t want my Pet Sitter to have to worry about them. I was going to use plastic igloos for the week for the week.