Incubating Duck Eggs and Going on Vacation

[Ahygre21]

I am currently on day 22 of incubating my duck eggs. I am planning on heading out of town for a couple of days (day 23 and day 24- returning late 24). My incubator is older and I have to manually add water everyday to keep it between 50-55% humidity. Is there anyway to maintain this over the days I am gone? Anything to add to my incubator to keep the humidity?

 

[nuthatched]

Drip system? Neighbors? Friends?