Query that needs a conditional where clause (Where applies for one column but not another)

I have a query that produces a simple result set based on date.  This is used as the datasource for a report.  The users added th option to day that they want year to date totals as well.  So its count(c.checkinID) as YTD, however with a a where clause that accepts todays date I am not sure how to approach this.

select l.lunch, count(c.checkinID) as Total_today
from camps_checkin c, camps_lunch l
where c.lunchID > 0 and
c.lunchId = l.lunchID and
c.dateused = @dateused
Group by c.lunchID, l.lunch
order by count(c.checkinID) DESC;

Now the results look like

Lunch              Totay_Today
---------------------------------------
Pizza                      342
Hot Dog                  197

What I need would look like this.

Lunch              Totay_Today                 YTD
--------------------------------------------------------
Pizza                      342                        24,764
Hot Dog                  197                        18,965

Any advise will be greatly appreciated.