I keep my 226 seafarer in a 30' slip, with less room to spare than you would think once the motors are out of the water. If I had a 228 with a pulpit, good chance It would to go to the next size up.
I tow my seafarer with a V6 Toyota 4runner. It's actually less towing capacity than your frontier, and I have no issues. Ramp is done in 2wd, I have yet to feel the need for 4wd. Hope that helps.