Well, it depends ...
A lot depends on the wind direction that day.
Some days, you'll have a refreshing beat up the lake close-hauled, followed by a slow dead run to get back. Other days, you might have a nice beam reach both ways ... great when it happens. :-)
When you get tired of running slowly before the wind, you get to learn how to fly a spinnaker ... that'll keep you busy for a while.
Don't fret about it (I'm sure you're not, really). Man, I remember a hot, humid July day when the wind dropped to nothing in mid-afternoon and it took me two long, sweaty hours downwind to get home. Went through all my gatorade. Almost enough to convince me to buy a trolling motor to push the Scot. ALMOST enough. :-)