Ahh vacation time is always challenging. I travel a bit for work so here is what I've come up with.
Feeding - While on vacation feeding happens Monday, Wednesday, Friday. I have a
Innovative Marine Gourmet Defroster. Food is pre-cut and placed into a weekly pill sorter. My wife just goes to the freezer with some tweezers, picks a food out and drops it into the Gourmet defroster. There is a seaweed clip that she can clip some too if needed but she usually avoids that.
ATO - I use a Tunze Osmolator for ATO. Normally I have a 5 gallon bucket hooked up. But if I'm going out of town for a bit I will pull in a larger container. My wife also knows how to switch out the ATO if I need it and if we are both out of town then my brother in law also knows how to change the ATO water and feed.
Supplements - I manually dose the tank... but you could use an auto doser. While I'm gone the tank gets a reduced dosing which is pre-measured and placed into these:
http://www.vitalitymedical.com/basic-speciment-cups.html?gclid=CPj17OOT1ckCFYpffgod6tYEJQ
The wife and brother in law know how to open the lid and pour them in. Instead of dosing twice a week it gets one dose just to help eliminate issues.
Water changes - I don't trust people doing water changes for me... So I just hire this out to the LFS if I am gone for more then 3 weeks. If I'm going to be gone for a while I'll do a change the day before I leave and a larger change when I get back.
That's about it. Don't let them clean the glass unless they have experience. I've had someone stick their hands in a tank to clean it and they had just got done cleaning stuff... Not a fan of dirty hands in my tank.
If you really want to monitor your parameters grab an Apex and hook it up online so you can watch the temp and PH. AND always get a battery backup. I use this:
http://www.newegg.com/Product/Product.aspx?Item=N82E16842102048 and just have my vortechs hooked up. If your afraid of power going out you can also drop a heater in the display and hook it up to the battery backup as well.
BOOM... That's about it

Happy reefing!