I have to say, I'm a little hazy on what you're actually planning to do. If I recall, you decided to scrap the current layout and relay it just how you wanted - I made a suggestion for figuring out trackplans but then you came back talking about fitting in a fishing port, town, industry, yard, and scenic area all in the same layout.
Seriously you're not going to be able to fit all that without drastically miniaturising all of it. Also you've not even decided where the tracks are going to go yet! I think you need to slow down, sit down, and think.
Lets get back to basics; You want an enjoyable layout. The most fun layouts (in my opinion) are the ones that "do a job", where freight visably moves from one point to another. That means industries or passengers. Industries are more fun because you get to do switching, so lets say you want a few industries on the layout. Now, to add to the fun, you could say that all the freight coming from and going to the industries must first stop at the yard to be arranged into trains. More operational use will be had out of the layout this way. You need somewhere for your freight to go, so lets say a freight terminal or harbour - this will need switching too. Now you've got your harbour, you might want a few fishing boats in there too, and a few buildings to land the catch - this could be served by the railroad, generating additional traffic and interest.
So far, you've gotten at least two industries, a yard, a harbour, and a fish industry. There are at least 5 points on the layout where switching can take place, and I gaurantee you'd be able to fit that into the space you've got.
Just have a think about it, it's not all that difficult. All you've got to do is put some industries down that require a railroad, then provide that railroad in a way that you'll have some fun operating.