Thanks for all your replies.

Rivlas - the bride & groom know we have just had a bub and only our names were on the invitation, I don't really want to ask them if we can bring DS2 along, nothing was suggested so I am just taking it to mean that we can't.

Ausgirl & CQuin - that makes me feel better, I was just unsure if DS2 was super grizzly and missing me and it was a strange place for DD and DS1 and they started acting up that it could all turn to mayhem and two people would make it easier on everyone.

I will probably go back halfway through and make sure all okay and feed DS2.

Thanks again Ladies.