I've never been in that forest, but IME tree tops are not homogenous (they look soft until they're not) and at glide speed (80-90 mph) in a Cessna 182, the impact will be substantial and then you continue down uncontrolled until a sudden stop. IMO if you have a choice go for a water entry.

In a thread a few months back the ditching of a ferry pilot who went low fuel en route Hawaii was caught on video presumably by the C-130 that joined on him to assist.

If I have a choice between tree tops and a lake, I'll take the lake every time. FWIW -- $.02 -- from a guy who won't be there...