Going out of town - freaking out a little!

I leave Monday for a five-day business trip to New Orleans ( Woohooo!) but I'm starting to freak out a little bit about the kittens. A close friend will be staying at the house so they will have someone there, but I'm just worried. He loves S&G and I know he will try to take good care of them, but he also has to work a lot and since it's summer he will be going out with friends, etc. as well, so I'm afraid they'll be alone a lot.

I'm so happy they have each other to play with, but I'm worried that they'll get scared when I don't come home for days - do you think this is a reasonable worry, or that since they'll (hopefully) have someone at the house, they won't think about me much?

What sort of directives do you give your catsitters? I'm preparing a small (ha) document with feeding, litter, etc. instructions and don't want to leave anything out.

I'm sure everything will go perfectly and the kittens will miss me just enough but not too much and will give me lots of love when I get back Friday night... but it's hard to get that through my worried brain right now

Any general advice you could provide would be greatly appreciated!

So, I think that subconsciously I posted this in order to get confirmation that my gut feeling of nervousness was right.

After reading the responses and talking to a few friends about it, I decided to install the kittens at a different friend's house. She works for the SPCA and her mom used to be a vet's assistant. She's a grad student who only works on weekends, and her mom doesn't work either, so there will be someone there at all times and I KNOW they will get fed at the same time every day, litter scooped EVERY DAY, water changed EVERY DAY, etc. They do have dogs, but they are not allowed upstairs (there are doors, baby gates, etc. blocking the stairs) and if no one is at home they are stored (lol) in large crates downstairs, so there is no chance they can get to the kittens.

The friend who was going to housesit for me is the girl's ex-boyfriend and she told me that last summer they asked him to stop in to check on their outdoor cat 3x in the 7 days they'd be gone for vacation, change her water and so on, and when they got home her water was disgusting and full of dirt and leaves even though he swore he'd changed it the day before. He's also been known to forget to charge his phone, fall asleep at friends' houses, etc. He was my first choice because he's my ONLY non-allergic friend (even my gf who works at the SPCA is allergic) but I just didn't feel right about it - thus the post - and now I'm much happier. Moving them wasn't ideal but I couldn't afford the petsitter idea and since they're only 12 weeks I'd rather someone stay with them overnight anyway. I only learned about the business trip a week ago (though I'd asked the original friend if he'd housesit before I even considered getting kittens or knew where they would come from).

So... I dropped them off a few hours ago and much like when I brought them home to my place from their mom's house, they did not require any hiding time - they just came out and starting sniffing and playing. My sweet, brave babies! I stayed for several hours and they fell asleep in my friend's lap, used the bathroom, etc., and seem really happy in their upstairs rooms.

I'm no longer worried and nervous - just missing my babies!

Thanks for the advice as always

My gf just sent me this pic of them sleeping in her sheet-covered office chair: