Drive to everything. Misleading map. Don't confuse with day use area.
The closed Mill Creek day-use area has access to trails through old growth redwoods. This Mill Creek campground has limited access to a few short trails. See notes below.
WARNING: Trestle Loop Trail is not a loop (since 2018 according to CH). The first bridge when hiking clockwise is in excellent condition. The second crossing is at a wide section of creek without any bridge or trail markers. The third crossing is impassible due to a ~6ft abrupt drop. Aug 2019 there was a single laminated sign on the trail floor stating "Stay on trail," an A-frame marker tied to a tree by caution tape over 100ft away from the abrupt drop.
Caution: The campground map dated 2006, rev 2019 is missing important campground details and vaguely marks the path of the Trestle Trail.
Most disappointing, this campground has no old growth redwoods and no immediate hiking access to old growth, rivers, lakes, or beaches and ocean.
The map provided on paper, PDF, and on signs is inaccurate. The good: There are many potable water sources on both north and south loops, not just one as on the map. Some of the bad:
1/ Several camp sites have stairs.
2/ Many camp sites are generously graveled making tent camping less comfortable and difficult to drive stakes.
3/ Site 27 is currently (summer 2019) the end of the Trestle Trail. Expect guests passing through.
4/ Camp sites vary significantly. This could be a positive if documented accurately: Some are stacked with one entrance path deeper into the forest. Some have stairs leading to tent sites above road grade. Some have both such as 5, 6, and 7. Recommendation: Read each site detail on ReserveCalifornia carefully or ask the camp staff at the entrance kiosk.
5/ A few sites are inaccurately placed on the map such as site 20 which is on the main loop, not on the side road.
6/ The map is missing trail details such as another creek crossing and switchbacks on the west side which would be helpful progress indicators.
7/ Especially for RVs and trailers: The campground map makes no mention of the poor entrance road conditions. In addition to a steep grade and tight turns there are several small sections of uneven roadway due to slides. A small section is washed out and only graveled. There are also abrupt speed bumps near the kiosk.
8/ The campground map includes info for some nearby trails, but only the Trestle Trail is indicated on the map. Nearby trails are accessible only from the WEST entrance to the Trestle Trail across from camp site 8.