Pros:
The thing with living in this area is that the "nearby courses" according to this site are as the crow flies. So some courses are close, but a ferry ride away. HJ Carroll has always been one of those that's far away from everything, but I finally made it out to play it.
Equipment: All of the tees are concrete and all of the baskets are high quality.
Navigation: There's a map on the kiosk to your right when you pull in. Take a picture of it. You won't need it for the most part, but it did come in handy. Then walk down the path to the right of the kiosk until you reach the RV. There's a short trail into the woods to your right. Go in there, and you'll find hole 1. From there the navigation is fairly straightforward, with signs to guide you most of the way. The walkout to 3 was only slightly confusing, but easy enough with the signage and map. Pay attention to the signs on each hole too. OB's and mandos are detailed, and some of the baskets in the open are close together. You don't want to throw to the wrong one like I did. And the blind pin for hole 6 has a giant flag on top of it so you can see where you're going.
Design: The wooded holes had me planning reasons to come out to Chimacum more often. They're short, but very technical and downright beautiful. And none of them are gimmes. The open hole design? Don't ask. This is the "pros". But you do have a variety here. Wooded and open. Shot choices galore, with hyzer and anhyzer lines. The little bit of elevation on the property comes into play with slight uphills and slight downhills. There's plenty of OB to keep the open holes at least semi interesting. It's mostly short, but luckily there's one hole (6) that does let you air it out.
Upkeep: This course is in great shape. Nice baskets, nice signs, minimal undergrowth... There's nothing to complain about here. And there's a soccer field nearby for field work! It feels like the locals take pride in this course, and they take care of it too.
Cons:
Equipment: The 1 basket seemed to be missing a chain. I know this because I missed a 5' dead center birdie putt when the disc hit the pole and nothing else, thus bouncing back at me. After glaring at it for 5 minutes, I continued on.
Navigation: The sign on the other side of the street that guides you to hole 3 isn't at the path to hole 3. It's only an additional 10' or so, but come on. Everything else is so well done in that regard. Plus basket tape could be helpful if you didn't take a picture of the map (take a picture of the map).
Design: The first four technical holes are a thing of beauty. They might be my favorite 9-hole holes of all time. No undergrowth, technical lines, wonderful colors... I really want to play them again. But the final five are a different story entirely. They all share the same area. The 5 basket is near the 9 basket. Any shot throwing toward 6 can cross any of the other fairways. You could quite easily throw to 6, 7, or 8 from the 6 tee and have it be an okay hole. You can throw long on 8 to the 9 basket. You can throw from 5 to the 9 basket (which I did, not realizing that the 5 basket was tucked to the left). It really feels like the designer started out the course with a wonderful area, ran out of space, and then just threw a bunch of baskets in a field to round out the nine. And then once you've finished, you have a long walk back to the car, or an even longer walk to Hole 1. It just kind of feels like they ran out of quality space too quickly, so they had to just cram 5-9 into an open area without much challenge other than the wind.
Other Thoughts:
I've already made my thoughts clear on the "two courses" here. It's a beautiful park. It has soccer fields, walking paths, and a BMX track. There's a lot more that I didn't even see. There was also a giant metal fish for some reason. So it's definitely worth bringing the wife and kids to if you're in the area. But it's far enough from everything else that it doesn't fit as a "stretch your legs while passing through" course, and it's just not good enough to be a destination course. That said, it is a challenging course with the technicality of 1-4 and the high winds (when I was there) of 5-9. I've never come that close to missing a drop in putt due to wind before. So it will help you to improve certain aspects of your game if you're there. I just can't justify being there just for the disc golf.