WordPress for large picture galleries

I developed and maintain several websites for a few non-profit organizations. Most of the websites are for car clubs some of which like to post hundreds of pictures of cars and events. The websites were developed using HTML/CSS/PHP/Javascript in the Expression Web environment. SEO is not an issue for these websites however as a retired individual I won’t be around forever to maintain the websites. I’m considering “converting” the websites to WordPress to make it easier for someone to take over maintenance when I am no longer available.

When a club sends me large numbers of pictures (10 to 100 or more) to publish I have a somewhat automated system using PHP. A DOS command gives me a list of file names which are copied into a PHP array. PhotoScape batch editor makes thumbnails of all the pictures so the “index” page will load quickly. The folder with the pictures and PHP files is linked to the website Photos page and its done. It takes only a few minutes for 10 to 100 or more pictures.

So the question is… Is there a WordPress picture gallery plug-in that makes it easy to include 100 pictures with separate thumbnails on a page? By easy I mean some sort of a batch process as described above.