Should we bathe before taking a dip in Prayagraj (Triveni) sangamam, and can we perform tarpanam on the shores of Triveni sangamam even if it is not an oblation day?

One can bathe at the place where you stay before taking a dip at Prayagraj or one can bathe in Prayagraj and observe sankalpam and take the sacred bath again. That place has the tradition of performing tarpanam irrespective of shraddha tithi or not, but our elders do not follow such tradition hence it is better to just take a sacred bath.