Dropping in several months later...
I was told Polipoli requires 4WD. It's mostly scrub and timber plantations, tho, and I'd think hunters and maybe motorbikers will be the primary visitors. Apparently there are still feral cattle wandering in there, too.
"Hosmer's Grove" is just a token offering by the park, at best. The area is cramped into a corner of the non-native timber plantation right next to a parking lot, and can be full of really loud groups on some days. No point in staying there as far as I'm concerned. Aside from the crater trails, if that's your kind of thing, Haleakala is a small and not very visitor friendly park. You're expected to drive up and gawk at the big hole in the ground for a few minutes and then go back down to Kihei just like the rest of the casual tourists. It's a shame people are locked out of the native wilderness on Maui, but they cut/grazed far too much of it down in the old days and what's left is pretty gnarly.
Yes, generally camping is illegal in the forest reserves here. You can get away with stealth/guerilla camping on the big island if you don't use fire or piss off the hunters. (some of the hunters are very sore they can't camp anymore, and could take it personally)
Last edited by bkrownd; 10-07-2010 at 18:39..