Clonazepam for a lot of people including myself really isn't much fun, it's really useful for anxiety though. It's very long lasting, as in, it's real slow to come on and real slow for the effects to subside.
I've also been prescribed Clonazepam in the past and would usually pop 6mgs as soon as I got my bottle and chill out, it would definitely feel nice but nothing earth shattering. The problem is here that the buzz is "good" at best, and with each successive day of use the buzz becomes less and less pronounced. This is bad both because you want to get high, and because this can lead to some pretty irresponsible repeat dosing, which in turn may very well lead to some fucked up antics on your end. I smoke too, and information I've read does indicate that smoking cigs while on benzos may lessen the effects, but I've never really found it to be that noticeable. You're not gonna smoke a cig and the all of the sudden be sober know what I mean.
If you're trying to get a buzz I would say space your dosages out over days. Take a couple days off in between as the Clonazepam is still effecting you long after you think it's stopped, it's got a gargantuan half-life. Be careful with those though, for an individual with no tolerance, those dosages are pretty high, and you do not want to black out.