A Baby Monitor! What a Great Idea! Thanks!

We did think about the cams, I saw an ad somewhere that had a set up for only $20, and we could do that, and want to, exactly for the reason you mentioned. My son is planning on sleeping out there this wknd and is going to try and get it. I'll feel awful shooting it, but I know, now it's had the taste of chicken, it will keep coming back.
I'm sure I know someone with an old baby monitor and that would be nice to have on as well.
The racoon does come around the same time! Usually between 1a-4a I'm generally a night owl and am often up at that time, so I've been keeping my ears open for noises, periodically going out to check on them and shining a flashlight around. My son leaves for work at 5am and he always goes out to check them and opens up the coop so they can get out in the 'run' area. I've heard the beast again, but we've been safe so far.
We have a wood coop, maybe I should take a pic? It's small and he built it from a design in the book he read. It is for a deep litter system and has a small area (about 8'x8') enclosed with chicken wire and small hatch type doors opening out to it.
On the back side are 2 removeable panels, that completely open the back of the coop and provide to access the litter.
It is the 1st thing he's ever built and had a lot of help from a cpl of his buddies. They didn't follow the plans exactly, and they need to add hinges so it's easier to open & close the back, but over all, they didn't a pretty good job.
He is going to buy hardware cloth and use that to cover his ventilation spots, I think they're too big to be left open, I read about squirrels attacking chickens too!?
So, he needs to get that done this wknd as well.
I'm worried about winter coming. From what I read though, it sounds like we should be ok, it just doesn't seem like it would be enough.
Thanks again for the tips, have a great day!