Backpack Recommendations

Go to shop and check it out.
For your reference, a cabin suitcase is about 35-40L
Also, you need to plan what you need to takes, take it out from cabinet and guess what size is required.
When you do the packing, it is handy to get some packing bags.

I manage 2 days on a 20 litre pack, so 30-35 litres should be fine for 4-5 days. But I don't carry extra shoes, but do carry my laptop and related stuff. The key is to ensure you actually use everything and not carry excess stuff.

Go check out what's available in store. A lot of space is lost in having multiple small compartments which never get used. Also, get packing cubes as they really help improve space usage.

Friction straps can help compress the clothing

it's a mistake to carry too much stuff
travel as light as possible and you'll enjoy it more
roll your clothes up and they'll take less space too

underarmour.co.uk/en-….ds

Possibly on the small size but I have this bag which is 29L and has a seperate compartment for shoes and it's brilliant.

60lt or bigger imo.
Daily carry is a 30lt.

My 30lt is rammed just with bits and bobs like sandwiches and stuff I take to work. Just big enough for a day out with rain protection and sandwiches etc.
No good for carting kit for a few days (edited)

was looking for berghaus 30 arrow review and found this grough.co.uk/mag…wed

look at the Nike Utility Speed.