Having been playing a lot of infantry armies, I've realised more and more that there is an 'art' to camping. As much as it is about hunkering down on the objective, you can't just do that and expect to win.
The reason for that is initiative. This was really brought home to me in the first game of my MW adventure at the BA Mid War One Dayer. I was facing off against a Mixed Tankovy Battalion and realistically I had nothing which could hurt him except my Heavy Mortars and AT guns (all two if them). Now at the same time he couldn't just roll into me due to close defense teams and weak side armour on T-60's etc. But he was able to dictate the game fairly easily by just sitting off and slowly wearing my army down before he assaulted. And this has been what I've realised I do with all my other defensive lists - I have something that will take the initiative back! I'll take you through my favourite examples of this below