Good fishing spot, mid-March

Hi All,

I'm looking for some thoughts on where I might find some casual fishing
spots to do some fishing around the middle of march. Here's the rough
of what we're looking for:
- good spot for Canadian family (mom/pop/couple of 8-10year olds)
- 15 foot aluminum fishing boat
- casual fishing. We'd like to catch some fish, but just as important
is tooting around in the boat with the kids. Quieter is better. (We
tried lake norman last year, it was way too rough/busy for what we're
looking for Eventually found a nearby reservoir that was far nicer
though populated with a lot of serious fishermen who we tried to stay
out of the way of).
- hopefully someplace where the weather is generally at least high 60's
low 70's that time of year.

We're in SW Ontario so we'd be coming into the US either at Buffalo or
Detroit.

Thanks!