Saving film for later that’s already loaded?

I bought a roll of ultramax and loaded it last week but I only ended up taking one shot . It’s my cousins wedding this weekend and I want to load another roll in and give her the whole strip of negatives after except I don’t want one singular random photo of a car at the beginning but I also don’t want to waste it.

I’m wondering if I roll the ultramax back up and take it out, can I use one of those little tools to grab the leader again and load it at a later date but just sacrifice that first shot by shooting something over it? That way I can load in some nicer film for the wedding and use my ultramax when I get back home ?