Welcome Brian and you've picked a beautiful part of Ontario for your vacation.
I've never fished Northwest Bay but have been fishing muskies in West Bay...a few miles south of you...for the last 10 years and I'd assume it's somewhat similar. Personally, I like to cast but alot of the guys are trollers and also do well, so you should spend time both ways and see what works best for you.
In my own personal experience, I've had the best luck casting large bucks & spinners in open water well away from any structure....strange as that seems. The cabbage weed will be in full bloom by the time you arrive and that's where you'll find the fish, usually. I see most fish in the 8-9 foot depths and usually their up near the surface and often hit the bait as soon as it lands.
Be sure to figure 8 after EVERY cast too and that'll definitely put a couple more fish in your boats.
My #1 bait is a very large black & orange spinnerbait but usually anything big & bright will work.
You won't get big numbers of fish up there but the ones you catch will normally be good ones at least in the high 40's or low 50's with excellent chances of much bigger.
The musky in my avatar came from there and is an average size.
I'll be up there the last week of June and again the 1st two weeks of August and will probably be driving past West Nipissing Resort the morning you guys are leaving for home.
Good luck and have a great vacation, and if you get into a good fish, please show us a picture.