Whether to tution for DT or not

Hii

I have my attempt due in Nov'11 and i am confused whether to go for tution for DT or not. Personally i want to study the subject on my own but others continuously says that it is biggest subject and it will not be possible to do it own.

Reason for not going wanting to got tution is Batch strength of 300-350 students.

Please help me out and any suggestion for doing self study.

Thanks