My more serious thoughts:
As I was raised, cash bars are tacky and asking for gifts is tacky. The idea is that you want people to share your happy day with you as your guests, and anything that reads as an expectation, much less a requirement, that they will pay money for the privilege is right out – because if they are paying, they aren’t your guests. Sure, everybody knows that a guest’s responsibility includes providing a gift, but the bride and groom are not supposed to expect that or to even care if they get one or not. If I didn’t need home-based stuff, I wouldn’t register for it. You can authorize your relatives to reply “money” if they are asked what you want, and if people ask you directly you can say, “Oh, we don’t really need anything; we’re just saving up for our trip to Jamaica.” Anyone with a brain in his or her head will draw the necessary inference.
Favors: Five years down the road, no one wants a candle / picture frame/ ash tray that says BOB & GINA, 4/22/03. Except perhaps Bob or Gina, and only if they are still together. So I cast another vote for consumable favors. My cousin did wee little candy boxes, each holding two truffles. (I think you can find them at Godiva, and no doubt could make up your own far more cheaply.) Maybe they’ll eat that two weeks later and think fondly of your wedding, which is pretty much all you can expect. Disposable cameras on the tables is a fun idea, but that’s a way for the bride and groom to get wedding candids, not a small gift to the guests, so I don’t consider them a “favor.”
Hand-addressed labels takes us into the realm of Done versus Not Done, and whether you actually care about that. Printed labels are easier, and so of course are Not Done. Hand-written addresses are a huge pain in the ass and therefore Done. To me, the sort of person who would snort at receiving a printed clear label on the outside of the invitation is the sort of person who would run their thumbnail over the back of the invitation to see if it’s really engraved or “only” printed – an asshole, IOW. I prefer things to be personal and as Done as is reasonable, so I would make this call depending on the number of invitations we were talking about. Less than, say, 50, I’d probably address them; more than that: labels. Life’s short, y’know?
Kids: I think the idea of kid goodie bags is a really nice touch and the butcher paper covered kids’ table is a good one. If you think there will be a lot of babies and toddlers, you might also consider hiring a babysitter or two, if your venue has a room they could use. That would allow the parents to drop the kids off and just enjoy themselves.
Otherwise: IME, if you’ve got good food, good drink, and good friends, and plenty of each, you’ll have a great wedding reception. 
Congratulations to you, and to Siege and all the others gettin’ hitched.