Of course a bigger rod would be better, but I say that if you are in the area, go for it.
The only rod I have right now is a 5 wt and I use it for Pike.
I've caught some big pike on it too.
One 22 lbs out of Badger and a 19 pounder out of the Bow.
I've also hooked into some that were just too big for the little rod, so I just straightened the rod out and let it snap me off rather than break the rod.
I would just suggest that you use Tippet that suits the rod. What I mean is you have to use a steel leader, but then use only 8 to 10 lb test leading up to the steal so You can break off the fish if necessary.
At this time of year, (and most of the year for that matter), you can sight cast to the fish in that lake, so you should be able to pick out a few nice fish to cast to that won't put your rod at risk.
Big streamers will be the ticket and unlike streamers you'd use on the river, they won't need to weigh a ton.
Just some weight at the front to give it some action and you should be good to go.
Good luck.