Somebody above, said to wear a backpack on a bike.

Extremely poor advice.

Bike bags are required. Ideally, front and rear. If you've got less than very minimal weight, then front and rear are necessary.

The low-rider front bags are probably optimal.

I spent about 12 weeks bike camping in the 1980s. Some of my info is probably dated.

I used home-made very crappy bike bags. Cracked rear axle because of weight; not bag design.