I am coding a plugin and it seems wordpress discourage use of Sessions. I have a kind of wizard for non-logged in users that asks for First Name, Last Name etc and some conditional questions from users in 4 different steps and then eventually registers user and shows his username/pass in last step.
I am stuck on this last step since I am not able to hold data in sessions. Should I even use Transients API to hold this kind of data? How can I make Transients data a non-logged in user specific? Don't want to use cookies or you think I must use cookies in this scenario?