If you just want to crawl the links on a site and dump the pages to disk, wget is the way to go. (regardless of if thelinks are dynamic or static)

The form issue is going to get you into trouble. I doubt you'll find any general purpose tools for doing what you want, because there are so many variables: should it enter 1 set of values in every form, what are those values? is there javascript that mutates the form input prior to submission?

The good news is, using LWP, HTML::Tree and HTML::Element It's REALLY easy to:

1. Download a page
2. scrape all of the links from that page and remember them
3. check for any forms on that page
4. get a list of all the form elements in that form
5. prompt the user how to fill our hte form and/or look up in some datastructure what to do with forms/elements that have those names.