Looking for suggestions

We are a small group (3-5), realitively new to hiking. Trails somewhere in the mid-rang (+ or -) of difficulty are what we target. We are hoping for hike-in Camping with a trail in the 5-10 mile range. We all agree that being near water is a must (hopefully it's fishable). No suprise, we'd like to be secluded. (Busy destinations aren't as undesirable.) Something within 4 hours drive from Portland or Salem would be preferred. Complete in to out duration would probably be 3-4 days. So, if there are any suggestions, please advise. Thanks-a-bunch, Mo NOTE: I know, I know. Everyone wants a beautiful hike with secluded camping at a prestine destination, but what's life without hope, right?