Are you planning on sending individual texts or a group text? Individual texts to people you regularly communicate with via text would be fine (not necessary, but OK). But if you made a group text to all of your guests, I can see that as coming across VERY obnoxious. I would be super upset to have my phone blow up like that (with all of the inevitable replies).
I think a reminder text to everyone might come across as a bit much, unless if you are sharing new info that wasn’t on your invitation or wedding website. Everyone who RSVPd yes is planning to come and likely is very excited already!
We've actually left out any information about parking precisely for this reason, to be able to write everyone the weekend before 😂 we're just going to send a group message, more or less like "people, we totally forgot to let you know that we've reserved free parking spaces here: *******. Can't wait to see you next weekend!". Haven't got the exact wording worked out yet, but we wanted to be able to remind people without it looking like an actual reminder... The things you come up with during wedding planning...
I guess it depends what the reminder is about. I sent my guests reminder texts the week of our wedding regarding getting their covid tests and or sending proof of vax. So if it’s something important you need to remind them about I say it’s fine.
I don't think this is necessary. People have been attending wedding for hundreds of years without receiving a reminder text. Most people who RSVP 'yes' and don't show up had something unexpected happen - they didn't forget. Your guests are excited to attend your wedding and are looking forward to it! They won't forget so I wouldn't worry about adding additional task to your to-do list the days right before your wedding.