With a bit of preparation you can vist Taman Ujong Kulon.
Transportation towards it will be the most time consuming. At least it was in 2003, things might have changed. But I had to use public transport most of the time.
A national park with loads of hiking possibilities. Went looking for the rhino (never spotted it) but was rewarded with otters, eagles, deer, monkeys, big goanna's, some 'leopard'(?) tracks, stunning (deserted) beach scenery.
Not sure if doable in 2 days, 3 days probably.
Traditional crafts, well loads of woodworking of several markets, and locals just doing their stuff which to most of us is a 'bushcraft' form, one way or another.
Kit wise... mmm can elaborate a lot more but it depends on your comfort zone too.
I would go for
shoes (like "adidas kampung", others might swear by Jungle boots, I never found much use for them)
Socks (plus 1 dry set for in camp, the way back or emergency)
Long pants (plus 1 dry set for in camp, the way back or emergency)
Swim trunks/boxer (plus 1 dry set for in camp, the way back or emergency)
Long sleeved shirt (plus 1 dry set for in camp, the way back or emergency)
Hat
Hammock & poncho liner (my Hennessy covers the mozzie netting)
Tarp
Parang/Golok (buy one locally)
Sarong (buy locally)
Billy (or army mug and bottle)
Platypus (or similar) with hose
Bits & Bobs (fire starter, water purification, cord, torch etc.)
Food.
Of course you can extend on this a lot more. Just a starter I reckon.
Have fun, wherever you're going.
Grtz Johan