Dear Ramabadran Sir,
Doing the shradh for the departed souls has been there for centuries and that's why our land is called karma bhumi( my thoughts). No other place on the earth has this distinction. Even if you or your brother forget to do the tharpanams etc for the passed away relatives or close ones, there are places in where you can do the parihara tharpanam. One such place is in between Mayavaram and Thiruvaroor. It is next to Koothanoor, only place on TN to have temple for Saraswathi.. village of the great poet Ottakoothar. The village is called "sedalapathi" at preesent. But the original name is "Thilatharpana puri". From the name itself you can find out the importance the place has for tharpanams. "Thila" means "ellu" in tamil & "seasame seeds in english. one of my friend Mr.S.V.Gopalan is in that village and has helped so many people to do the tharpanams on auspicious days like "Thai amavasai" etc. when you do Tharpanam in that village it is believed that our pitru 's come and take the pindams . Even Rama did tharpanam for his father in this place.
The village lies next to Arasilaru a branch river of Cauvery, amidst lush green paddy and sugarcane field. if you can plan and come down to TN u can do the shrads and have mental peace. I will be more than glad to help out in any way.
Cheers.