I don't take mine - NO WAY! What a nightmare! If I do take them to a shopping centre it would be during the week but I wouldn't ever put myself or them through it on a Sat or Sun.
TBH, I buy most of their stuff in Tesco while I'm doing normal food shopping or on-line so I just order a job lot in different sizes, try it all on at home and send back what I don't need.
I understand there are all sorts of reasons that people do take them on a Saturday or Sunday but I've definitely seen whole families out with kids looking (or sounding!!!) clearly unhappy and miserable and I just think 'why?' - if it's that tortuous for them and you do have a partner to look after them (which they clearly do because they are there!) then why doesn't one stay at home with them while the other shops?
If I need to buy kids shoes or something, I go, get the shoes, come home! I wouldn't dream of idling round the shops with them in a buggy - how bloody boring for them.