Mr frogoutofwater and I did a 3-week trip to Malaysian Borneo and to Singapore in 2014, so my gear list might be of use to you. I was mainly interested in photographing animals, flowers (macro), and some city scenes - less interested in landscape photography at the time.
What I packed:
- Lowepro 200 AW sport. PERFECT bag for travel days and anytime I needed to have all my gear with me. It's super-lightweight, has room for a decent amount of camera gear plus some extras, sits close to your back (but without sticking sweatily to your back), has a built-in raincover, etc. The surprise bonus was that the "water bladder" was large enough to fit my small laptop (11.6") plus my passport wallet (good way to protect it).
- I packed in my suitcase the Tamrac Aria 3 shoulder bag (I also have the 6), and used that bag for short excursions when I only wanted to carry my camera plus an extra lens or two and some odds and ends. It also worked well as a purse (that's important to a girl), but it's not girly so my husband didn't mind borrowing it. It blended into the city well and I could take that bag out to dinner without looking like I was carrying a camera. It's also water resistant, easy to wipe clean, very lightweight, etc.
- K-3
- Lenses: WR 18-135, WR 55-300, 77mm limited, 15mm limited, 50mm f/1.8, Tamron 90mm f/2.8 macro. I did put clear protective filters on my lenses. My husband brought an all-in-one-zoom (I can't remember whether it was a Sigma or Tamron, with a range of 18-250). He also brought a tripod. (I debated bringing my Sigma 17-70 2.8-4 but decided that the weather resistance of the 18-135 and longer zoom range was a better choice. I occasionally regretted not having the Sigma, but overall I think I made the right decision.)
- AF360FGZII flash
- Accessories: rocket blower, pec pads (to clean lenses), lens brush, twelve 16GB high speed cards, card reader, several ziplock bags, small reflector, flash cord
What I used most of the time: The 55-300 was on my camera about 70% of the time. The rest of the time was a mixture of the 18-135, the 77mm f/1.8 and (once) the Tamron 90mm. Mr frogoutofwater mostly used his all-in-one-zoom, the 50 and the 90.
What I wish I'd had for the trip (but didn't acquire/discover) until later: the 35mm macro plus teleconverter, the fisheye 10-17 (used this a lot in Iceland this year and loved it). Nikon lens cleaning wipes
Nikon Moist Cloth Lens Cleaners (21 sheets) 8175 B&H Photo Video
What I wish I'd left behind: the flash (never used it), the 15mm.
Much as I love the 77mm, if I were to do this trip again, I'd probably leave it behind and take the 35+50+teleconverter combo, as well as the 10-17, 18-135 and 55-300. I'd make my husband carry the Pentax 100mm macro (to combine with the teleconverter) and leave the Tammy at home. If I had to drop one more lens from the list (to keep the load light), I'd drop the 100mm macro.
A few other bits of non-camera gear that I highly recommend:
- Ben's mosquito repellent wipes (with DEET). Oddly, the main places we encountered mosquitoes were the airport. These wipes are great because they're individually sealed (and aren't in liquid form), so you can put a couple in your carry-on, or in a back pocket and have repellent whenever you need it, instead of having to carry a sticky bottle around.
Nikon Moist Cloth Lens Cleaners (21 sheets) 8175 B&H Photo Video
- A tiny, quick-drying camp towel (about the size of a facecloth). These are great for mopping up sweat when it's humid.
- I mostly wore super-lightweight long-sleeved shirts that had been pre-treated with permethrin (an insecticide) and similarly treated lightweight long pants, which meant that I didn't have to wear sticky insect repellent (or sunscreen) for much of the time. The comfort difference between long sleeves/short sleeves and shorts/pants is actually minimal when it's really hot, and not having to wear sunscreen and insect repellent tipped the balance in favor of long sleeves and long pants. Plus, that attire was more appropriate from a cultural perspective.
- I really like Eddie Bauer's Horizon line of pants: super-lightweight, moisture repelling and quick-drying, with lots of pockets for small bits of camera gear (lens caps, wipes etc).