I always like evites, because I'm a scatterbrain and tend to lose the paper invitations. I also like seeing who else has been invited, so I don't put my foot in my mouth and mention the party to someone who hasn't been asked. It's also helpful if I want to organize a bigger group gift.
Your food options sound just fine. We normally do something like pizza and then some sides, like fruit, veggies, some chip or cracker-like snacks. I like to make sure to have a good mix of easy finger foods for the kiddos.
I always have alcohol at our parties. Husbands are more likely to come if they know there will be beer. Having an extra parent on hand means that the moms are more able to relax and have fun as well, so it's just more fun for everyone when we serve adult beverages. :)