Best Weatherproof DSLR ?

[Barney]

Hi all ,
After spending most of yesterday searching the net and making my head hurt , I thought I would ask the forum "which is the best weatherproof DSLR?" [and weatherproof lenses].

Primary use will be travel/fishing/bird photography.

I prefer a 'larger' camera body as I have big hands.

I like the look , price and reviews of the Pentax K3ii and DA 16-50mm F2.8 lens.

What I'm looking for is a quality weatherproof DSLR , with a quality small weatherproof zoom to match [ 18-55 , 18-85 , 16-55 size etc etc] , and a bigger zoom around 100-400mm , 150-500mm or 150-600mm , also preferably weatherproof , for bird photography.

I saw that both the Sigma 150-600 and Tamron 150-600 'sport' lenses are NOT available in Pentax K mount [sad face].
My budget for the bigger zoom lens is $1k-$2k.

I would welcome any other suggestions/recommendations. Any make/brand of camera.

I don't mind paying a little extra to buy in Australia.

Thanks in advance for any advice ,

Barney.