i have used a trick where i make a bogus frontage line at the setback and lay in the lots that way, then erase that line, explode the inside lines, extend, etc, etc. it doesnt take too long and makes for magically even frontage at the setback line.
it is fast, easy to erase and start over, easy to redo, easy to iterate.
civil 3d parceling is great and fast for some stretches, while your old standby methods still work fine along the tricky parts. i have personally found for my projects (i can;'t speak for other parts of the country) that the time saved on the fast stretches is pretty significant over the old LDT and ACAD methods I used to use.