Patti...
If you are able to log in the day before and print your "A" passes for the five of you, you will likely be fine to arrive at the airport as one usually would...about 90 min. (plus or minus) before your flight. There is no need to camp in the "A" line for hours and hours unless you have to be the first on your flight. Even if you spend your airport time in the gift shop, etc...you will still be boarding ahead of all the "B" and "C" people. That said, you may end up in the back of the plane. At least with 5 of you, assuming 2 adults, y'all can switch out standing in the "A" line.
Have fun!!
edited to add...this may all not apply if you have little ones who need car seats, etc!