But I think there's a way out. My idea is for anarchist groups to start openly anarchist projects. However, we also help local communities set up their own projects - provided they're democratic, not a charity, not a Trotskyist front etc. If Trotskyists or Christians try and take these groups over, we give the locals advice on how to spot this and stop them. So, we can keep groups specifically anarchist and spread our ideas, and yet involve the maximum number of people in a genuinely democratic way.
Campaigns can achieve more.
It's true that a successful campaign will achieve more than a single piece of mutual aid. But it isn't a fair comparison. For example, Melbourne Food Not Bombs has five events per week. Even very successful campaigns, like the Poll Tax campaign in Britain, don't seem to have really helped the anarchist movement in the long run. You'd be abandoning class struggle.