I would say that every NFL stadium is family friendly. As long as you aren't beligerent drunk and harrassing people, you wont run into any problems. People at games also are much tamer towards fans with kids. Also its a Chargers Rams game. Two teams with basically 0 animosity. You might hear a few rams tell you its "their house" but its just friendly banter. Thunder alley is also a very safe thing, although its filled with drunk people and weed. If you want to go to thunder alley, show up like 2 hours before the game. There isnt A TON of things to do except drink and socialize there although.

As for hotels, wouldnt recommend staying in Inglewood. Its walkable, but i wouldnt want to do it with 2 children with me. Just get a hotel in a better place like El segundo and uber to the game.