Nah, not cumbersome at all.  Just sign up for a free or paid account on adjustedcostbase.ca.  That site provides a great service to Canadians, and it's worth looking into.

Whenever you buy or sell a security, you make an entry, and it tracks your ACB and capital gain/loss on a continuing basis.  For RoC, all you have to do is enter the figure off your tax slips when they come every spring.  

If you spring for a paid account, the site will consult its database and pull up the reinvested ('phantom') distributions, as well.  This is a good thing, because it saves you time, money, and pain in the derriere.  I find it's worth the subscription fee ($50 a year IIRC) anyway, although I got by with the free account for several years.