Congrats on getting an initial partnership meeting. I agree with a lot of the great advice given on here so far.
On whether or not to bring legal docs, I agree with some of the other advice that you probably want to leave those behind as anything that would be in those will most likely have to be customized.
As to whether you should go over the PPT or not during the first meeting, a lot of that depends on your comfort level and the personalities of the people you are meeting with and the setting you are meeting in. If this is a more informal meeting, then I would go in with it prepared, but plan not to use it unless it feels necessary.
The first in-person meeting is usually a great opportunity to just hear about the potential partner's needs and get a sense of where there might be natural incentive alignment.
Having additional items like your PPT deck or legal docs are great items to close out the meeting with as a next step. Being able to close a meeting strong with solid next steps like "I'll send you a deck to review with some additional resources and then let's schedule time to meet again after that to go over any additional questions or action items that come up" is a great way to get to a second meeting.
It will also allow you to have more time between the first and second meeting to put together some possible terms on what the partnership could look like from the feedback that you'll get from the initial meeting. Saving those assumptions on terms until after your initial meeting will ultimately show them that you really listened to their needs and came back with terms that you feel will work for both organizations.
Good luck with the meeting!!!