You'll be fine. I run 6 or 8 lbs. for lakers. Never had a problem around here. Just have to be aware of what you're using and take it slow if you do actually hook into something big. So, for one trip, I wouldn't rush to make any changes.
However, depending on how long your leader is, you may want to lengthen it. Winni is very clear, and trout can be line shy. I usually run between 6 and 10 feet of leader.