New today to the forum. I live 6 blocks from Wrigley and take the red line to Skokie (and the Howard station) regularly.
The neighborhood near the Howard El stop is not the greatest, but if you park in the park & ride garage, you should be ok. To be on the safe side, though, my suggestion would be to leave nothing in the car to steal, put the club on the steering wheel and leave it unlocked. This is my practice everywhere in the city.
Your other option is to park in the neighborhood just north of Wrigleyville, Uptown (where I live). You can almost always find street parking somewhere within 6 to 8 blocks of the stadium if you're north of it. Some of the parking rates at pay lots aren't outrageous either. There are some places that you can park really close to the field for almost as cheap as 4 round trip el tickets. If you do park on the street, make sure you don't disobey any parking violations as most Chicago parking tickets are $50 +!
If you want to go to bars after the game, your busy options have been listed (as has Bernie's, where I've never been). I might reccomend a few other places, though.
Cubby Bear - Just south of Addison on Sheffield (it's a huge sports bar for being a storefront joint)
Nisei Lounge - Between Cornelia and Newport (south of Addison) on Sheffield
Underground Lounge - On Newport (Two blocks south of Addison) Just west of Sheffield
Nick's Uptown - Sheridan (same street as Sheffield, just 3 blocks north of the stadium) and Irving Park (4 blocks north of Addison)
Twist - Corner of Newport, Sheffield and Clark great Tapas - try the Jalepeno Gnocchi
Penny's - Just south of same corner, good, cheap noodle place
Cubby Dog - Just south of Addison on Clark, across the street from Slugger's, good Gyros
"... gas prices are headed through the roof, everyone in the Middle East hates us, Toronto and Seattle are in last place -- happy 1978, everybody!." - Bill Scheft, Sports Illustrated, April 26, 2004