>>1957568
100kg in a backpack sounds painful
just get the trailer
im not sure how much weight ive hauled in mine probably not even half that but i gotta say a trailer is gonna feel alot better than a backpack or pannier bags
i use mine for hauling shopping and while i ride i always forget im even towing the trailer, you just dont feel the weight at all its kinda surreal
get a giant cassette too if you gotta deal with hills like i do