Either boat will do the job as long as you are comfortable operating this size boat. Rainy can become very windy so when you park for the night, make sure you have tied off to decent sized tree's that can handle the stress. If you pick the boat with the genny, be aware of operation during periods when people could be swimming. A hazard that can kill is carbon monoxide (CO), a heavier than air gas, which can settle near the exhaust. This is a byproduct of gasoline engines and care must be taken when people are in the water swimming. turn it off to be safe.

If you have never been on Rainy,you should have a chart, mind the markers and stay away from the rocks and shoal areas.

If you are bringing smaller boats for fishing and exploring, fuel for the houseboat won't be to bad as it will be tied up most of the time. Difficult to say, at this time, what the cost of fuel will be, but I would assume $2.25 / gallon might be the minimum.

It's a beautiful area and you should have a wonderful trip. Bring all your trash out with you and try to leave the place better than when you found it Have fun!