Packing for a 4-month bike trip

It's now less than a month out before we start our trip. We've been training and prepping and thinking about what we need to bring considering we will be 5 beings (3 humans, 2 canines) in a 24-foot long motorhome.

I'd like to share with y'all the packing list that I received via email from my dear father several weeks back.

1. 3 short sleeve jersey

2. 2 long sleeves

3. 1 pair arm sleeves

4. 1 pair leg sleeves

5. 4 Padded bike shorts

6. 1 biking pants

7. 3 Gloves

8. Shoes suited to bike's pedals

9. 3 Cycling socks

10. 3 bandana

11. Rain suit

12. windbreaker

13. long underwear top/bottom

14. full-fingered gloves

15. balaclava

16. Swimsuit

17. 1 underwear

18. 1 good t-shirt

19. 1 pair sneakers

20. 1 reg shorts

21. 1 reg pants

22. Baseball cap

Seems like a solid, minimized list.

Ladies (but also gentlemen!) I'd like to draw your attention to point #17....

17. 1 underwear

ONE. UNDERWEAR? I about spit out my water when I saw that. I'm not sure how many of y'all have done a trip like this, but I am very curious about the underwear situation.

Don't worry— I plan on taking at least 3 pairs ;)

Also based on this list, I'm not as upset about missing my dad's first cross country ride in 2019. Not sure what that one pair of undies he took from Florida to California smelled like, and I'm fine never finding out.

Maybe we should add a #23. Plenty of Fritos for snacks