As a semi-local, at first glance a few things I can see:
#7 (Around We Go) I would not hit coming that way. Parking is advised behind it in the hotel parking lot so it is best done when The Home of the Trolley is.
The drive between 9 and 10 is kind of funky. They are really just across the street from each other and you don't need to wrap back around.
I'm pretty much certain the road between 16/17 and 18 does not exist except on paper. Best bet is to go back to 15 and around. Same with number 19, on that non-existent road. It's actually a hike I believe around Coffenbury Lake. Instead you would need to go up to where it says NW 11th to access Ft Stevens State Park on Peter Iredale Road. The next grouping of caches are within this park and there is a $5 day use fee. (I think $30 will get you all Oregon State Parks for a year.) Burma Road does exist here, but Jetty Road doesn't until further north where Burma ends. 29-33?34? is also actually a trail, not a road that can be driven. If I remember right, 29 and 30 can be hiked up to from 28's parking lot. Not certain on 31. 32 to 38 in Fort Stevens are accessed by taking Jetty Road to the main road, going north to the northern entrance for the more military area and parking there. Here's a copy of the state park guide since it's confusing: http://www.oregonstateparks.org/images/pdf...trail_guide.pdf
#25 is not arrivable as done on the map. I love it but it's a hike coming up one beach or the other so the time estimate is way off.
42-48 are along the waterfront trail. I'd need to check but I'm not certain how many have parking near since you aren't really able to drive down it like maps thinks.
#50/51 there is really parking for only one vehicle at that spot and it is right off 101. Maybe an advisory that you might have to park across 101 and walk down to the light and back if the spot is filled. Plus that is a trail between them, so I can't remember the distance (maybe a mile or so) is needed to walk out to 51.
I'm not as familiar with the Tongue Point region, but that's at least what I know from Warrenton.
