A few months ago, I was gone for almost 24hrs to sleep over at my cousin's house, so before I left at 7PM, I made sure to give him his veggies for dinner, clean his litterbox, added lots of extra hay and even made a temporary hay rack with a box just in case he ran out (might've been excessive but it made me feel better). He drinks a lot so I gave him a second bowl of water and I gave my mom a bag of his pellets to scatter feed in the morning. I came home around 4PM the next day, gave him his bowl of veggies, and spent the evening giving him extra pets and kisses to say sorry lol.
My mom had the day off so she was able to peek into his room a few times to make sure everything was okay and sent me some pics. Would your dad or someone else be willing to just check up on your rabbit while you're gone?