Oi. I'm a bit confused.
Do you purchase all your chicken feed, toys, bedding, feeders & waterers only on line?  If from a feed store, is it more than an hour away like the farms are?
I'm just a lot surprised that no one has mentioned your feed store or even pet stores. Even if all employees know nothing about chickens, they should be able to follow instructions.  Some would, I would think, and you can ask next time you pick up feed & bedding. Most receive only minimal/minimum wages & even if they don't know much (anything?) about chickens, armed w/ your instructions, the link to BYC & your phone #s, they should do great at your "job" requirements.  Who knows? You may create a new chicken afficiando!!
Besides 4H, there is also both the Ag & Livestock sides of FFA (Future Farmers of America).  You can check with the instructors, for reliable youth. They pay their own way to different functions, so cash or donations go A LONG WAY.  Even JROTC youth may be interested.  Most are VERY reliable - if not at high school level, then college level. 
Check with NJSU or other AG based institutions - they should have contacts.  
Even if only small animals vets around you - they will also have contacts for livestock vets or people who would be willing & able to fulfill your specialized instructions.
Sounds like you have enough time to make your lists, contact & interview folks & be set for your vacation.  If you truly don't find anyone who meets your standards, you have time to restructure vacation plans (even w/ kids).