I Like solar on my current boat and use the heck out of it. My last boat was smaller, had few toys, an we got by quite well with 2 batteries and a marina every 3rd night. Much depends on how much you motor; it works for some but many sailors hardly motor. I think solar might be good for you. It's come down and gotten better.
First, figure out how much you use. Amps x hours for every thing on the boat. This is so personal that few rules apply. However, I will remind you that you will use far more hours of cabin lights in the fall (shorter days).
Then figure out the AH of the battery bank; only count about 1/4, to allow for battery age, cloudy days, and the fact that you should stay above 50% for best life.
Figure out what you will get from running the engine. Full amps require high RPM.
Then figure out what you deficit is. Panels generally add (watt rating/13v) x 5 hours, as an allowance for low sun angle. They do better in the summer, and worse in the winter because of shorter days.
Given the size of the boat, I would think a single 60-85 watt panel should be about right, with a conventional charge controller; MPPT wouldn't really be justified at this scale. Make certain the panel will NOT be shaded, as even 10% shade can shut a panel off. This will be the greatest challenge on a small boat.
This is not cheap, perhaps $450 if you're handy. For short trips, up to 4 days, another battery will be smarter. That is what I did on my first cruising boat. LED lights are another option; instead of generating more, use less.
Perhaps this post will help, though there is a lot on the web.
Sail Delmarva: Solar Panels