Hi, I have no experience and not heard about Vaka caterer. One and half years ago for my sons wedding we arranged the caterer 'Subham Ganesan'. They also provided other services like mehendi, bangles, pop corn etc. Their service, food, servers, girls at the reception everything was excellent. Even last Sunday when I met one of my husband's cousin she was praising about the services by the caterer. Mr. Ganesan also gave good ideas and told us anytime during the wedding for any urgent help we can consult them first before running around and searching for it.
Try Iyers Kitchen. They catered for our son's upanayanam last summer. Very clean, very friendly, and best was that he was willing to change his menu per our request (he did give suggestions on combinations etc). He is also a contractor so will be able to provide all the stuff like melam, kolam, the tambulam bags, etc. The only thing extra was the priest. If you need more info on him (website, phone etc) pls send me a message.