Given the distance between the north end of Camano Island and the Seattle transmitters as well as the obstructing terrain, I would opt for a full size combination such as an Antennas Direct DB8E + Antennacraft Y10713 + RCA TVPRAMP1R preamplifier. Start with the DB8E facing about 150° and the Y10713 pointed at about 175° per a compass.
The TVPRAMP1R has inputs for both antennas.
Be sure to avoid aiming into nearby trees or structures, including your own.
__________________
If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)
(Please direct account activation inquiries to 'admin')