Here's hoping that people are much more polite
People are mostly lovely, on these things.
It's great that there's one in Ipswich. So many different people from different parties and different views on stuff, seem to be joining in with this.
Just reposting OYBK's advice from earlier.
If you are worried about safety then my experience has been don't be smile People at these demos seem to be a very moderate bunch of people, especially during the day. I've never seen any trouble. Sometimes you do get Leavers who are there to cause a bit of aggro. If they get that way the police surround them astonishingly quickly. If any of them do get in your face a bit, just treat them like we do trolls here. Blank them. They aren't worth it
The police are there to protect people and keep things safe. Be polite and be nice to them. The ones wearing light blue are liaison officers and are especially approachable. We have a right to protest
Most of all, just be proud of yourself for standing up for our democracy. Take placards, whistles, drums, whatever you fancy, come along and peacefully (if noisily) protest
The most upsetting thing for me at these things is how young the police are. 
Hope the sun shines. 