First off how big is your plant and what size container is it in? I agree with phytokind about covering up the soil, this will infact cause mold. I would suggest over watering like crazy before your go. I've also made a niffty little auto watering system with a gallon milk jug, drilling a hole about 3/8" in the cap. Attaching it sideways somehow, and than let her drip, its a little inefficent but it will get the job done. If your plant is very healthy like you say you should have any problems. Also I would augment the lighting schedule as this will cause more stress to 'her' that going a little while without water.