Is it rude to say to someone that I’ll be too busy to text

I’m texting a girl that I’ve been on a first date with that went really well and we’ve been texting frequently daily and I’m planning to arrange a second date. The problem is that I’m gonna be part of an event on the weekend that will take literally all my day from 10am to 10pm and I’ll have almost 0 access to my phone at that time. Am I gonna come off as rude if I tell her that I will be super busy and won’t text as often or at all throughout the weekend? She’s a nice girl and I don’t want her getting the wrong impression that I’m losing interest in her or something like that.