Not really. I mean, it obviously depends on the projects, but I can normally involve myself without too many difficulties. I can just volunteer myself to do a portion of the project that I know I can do. That being said, it can be a bit demoralizing sometimes.

Most group projects are digital art this point. I could see making presentations be challenging if you don't know how PowerPoint or Google Slides works with a screen reader, but beyond that, you can likely participate fully. If there is something you need to observe, you can work with someone to make sure you get the data or notes. You might have to find ways that you can help, but things like this may not be common. Most of the projects over had were writing a paper together or presentations on topics/books/articles

Your question was a bit unclear. It's very easy now for groups to share information via a google doc, or even a drop box folder. Sure the blind person can't contribute to making a powerpoint presentation, but they can still lead seminar, and find cool sound effects or music if such are needed. I studied Literature so not too many group projects, though I still had a few but all of them I felt I pulled equal weight.

Last group project I was in I did pretty much all the shit lol. So no, I am not the burden, I cary the burden.

If you feel like you're being a drag, involve yourself differently. Obviously it depends on the project and sometimes all you can do is hold up your hands and say eh, well, I'm in a moral support role here but in an ideal world your college won't be setting you stuff to do that falls too much into that category.

Find a way, solve the problem, think of something you can do, don't just try to do stuff you really can't. Easy to say of course, harder to do, but lateral thinking is your friend.

You have no idea how bad some law students are with anything involving a computer so I always know I can help.

All group projects have varied levels of participation, just try to contribute as best you can. And remember that they are great practice for becoming adept at contributing to a professional team or department later. Awkward as it may feel, etter to learn your collaborative strengths and weaknesses now than later.

And btw, if it's a class that doesn't impact your intended career, stress even less.