I pulled into a powered site off Mundaring Weir Road last month and counted four vans with mountain bikes strapped to the back before I'd even got the chocks under my wheels. That's the Perth Hills in a nutshell these days. Walkers and riders aren't just day-tripping up from the city anymore, they're basing themselves out here for three or four nights, and the caravan parks near Perth Hills trailheads are feeling it.
I've been watching this shift for a couple of seasons now. The old pattern was a quick drive up, a walk, then back down to Perth for the night. These days more people want to wake up fifteen minutes from a trailhead with coffee already on and the hills still cool before the day heats up. Fair enough too, the Hills in early morning light is a different place to the Hills at 2pm in January.
Why basing near the trailhead actually matters
It sounds obvious, but the difference between a twenty-five minute drive and a five minute walk to a trail entrance changes how you use your time. I've done both. When you're camped close you can do an early loop, come back for breakfast, then have a lazy second walk in the late afternoon when the light goes gold through the jarrah. When you're parked further out you tend to do one big push and call it done, because nobody wants to pack the van up twice in a day.
There's a decent write-up on this already on the site, Perth Hills caravan parks near the best trailheads, which maps out most of the options I'd recommend if you're trying to plan a proper multi-day stay rather than a single day visit. I'd treat that as the starting point and this piece as the on-the-ground version, the bit about what the sites are actually like once you've reversed in.
What a decent powered site near a trailhead looks like
Not every park advertising itself as