Thanks for all your responses!
I've decided to go ahead and rent two lenses for my trip. I'll use the 18-135 as my daytime/outdoor lens along with a prime for indoor/lowlight.
I think you'll enjoy that plan perfectly. I have 25+ lenses, both native and manual adapted lenses, that I use with my A6300, but when I go to Disney, most of the time especially in the hot seasons I end up shooting 90% of my shots with the 18-135mm...if I bring any other lens option, it's usually a fast prime for dark ride photography and sometimes the ultrawide. But the 18-135mm is just such a perfect, versatile travel lens and really is nice to have no bag at all, just camera and one mounted lens, bypassing security checks and not having to worry about where to store a bag on a fast ride.
In cooler months, and on special photo trips, I'll bring more lenses with me and shoot with the 10-18mm, 16mm, 30mm, 35mm, 18-135mm, 55-210mm, 70-300mm, and more...so I'm not adverse to using many different lenses depending on the park and the need - but when I just want a one-lens solution, or when it's ridiculously hot and humid, it's the 18-135mm.
Should I go with the Sigma 16 1.4 or would a 30/35 be more useful?
I shoot a lot of dark-ride photography at Disney, because I enjoy the challenge - until the Sigma 16mm F1.4 came out, I was limited to 30mm and 35mm fast primes as my widest options. On APS-C, anything 50mm plus is way too narrow, and even 30mm with the crop factor means having to shoot a lot of the dark ride scenes as early as possible before you get too close, or shooting mostly tighter closeups. Once the Sigma 16mm F1.4 came out, it quickly became my preferred dark ride lens...and remains useful also for night landscapes, building scenics, etc which at Disney, often the wider the perspective the better, as everything is in scale and you are often quite close to the scene you're shooting.
For a dark ride scene example of where the wider prime can really help, here's a scene in Pirates of the Caribbean with a few different primes.
First with a 35mm F1.4:
You have roughly 10 feet of forward travel rounding a bend to shoot this scene before you get too close and then pass it...so most shots with a 35mm lens on APS-C are going to be fairly tight and frame mostly these three prisoners. But the Sigma 16mm gives a lot wider perspective, allows you to shoot the scene much closer, and also allows you to capture the entire scene, which includes the dog with the key to the left of the prisoners:
That Sigma 16mm shot is from about the same angle and spot as the Voigtlander 35mm shot.
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Justin
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