Common sense and curtesy is more important than restriction. I run large lakes as well as electric only lakes. I’m running a 21’ bass boat with a 250 Yamaha. On smaller lakes that allow unlimited HP doesn’t mean you have to use it. There’s some I fish that I’m usually just above idle to show curtesy to smaller boats,canoes or kayaks. The biggest issue on small lakes or huge lakes is inconsiderate or ignorant boaters that don’t know or care of the rules or curtesy on the water. Get whatever size boat that will fit your wants or needs. Good luck on your search.