Not quite 10k (it's the transition alt round here, so not avail..), but took a fully loaded 1109kg (it has an STC for nearly 50kg over standard MTOW for type) PA28-161 up that way twice at the weekend.
Out QNH1010, 43degrees (C) on ground. Long old slog to 8500 - something over 60 track miles, 1500 up under some clouds, 500 down in the gaps. never thought I'd be dolphin flying a spamcan. Worried quite a bit about temps; OAT +20 at 8500, still in the convection layer. Smoothed out later for a 30nm descent bottom of yellow arc as per poh - very little noticable cooling over the cruise temps. Really would've rather stayed on the ground.
Back QNH1013, 30deg on ground, much more pleasant. Climb somewhat more impressive too, down to 200fpm past about 6000, 100ish for the last bit to 9500. OAT +15, smooth, tailwind. leaned as appropriate, much more sensible temps on climb too.
It may have been more economical on the way out to stay low, but was meltingly hot - on the way back we traded a 20kt headwind for a 10kt tailwind above 6500.
Nav by VOR/NDB primarily with garmin moving map doubling to provide DME from Melbourne, and a DR/plog plan as the final (mixed winds making that a little less accurate than usual.