I'm a 16 year old citizen of Ukraine, living in Poland, and I want to travel to Lofoten, northern Norway, by hitchhiking from Warsaw. One of the adventure's goals is to spend as little money as possible. And when it comes to where to sleep, problems begin, because I'm not allowed to use couchsurfing etc. because I'm under 18. It's okay for me to sleep in a tent and a sleeping bag, but it would be nice to stay at someone's home from time to time to take a proper shower, to cook something in the kitchen and to sleep beneath the roof.
One option I thought of is for my father to create an account for me. Then maybe I can use it, just to see where there are houses with couchsurfing hosts in the nearest city, go there ask them whether they'll let me to stay for a night. Would I be able to do this without a problem?
Also, I have a type D visa allowing me to be in any Schengen country for less than 90 days.
Edit: I see, that i have forgotten to mention some details, so it led to a lot of misunderstanding regarding my situation.
I live in Poland with my family, and no, I am not going to just run away from home for this trip :D. No, I'll of course inform my parents about the trip and I'll have written permission from them to travel (i even already have one :). I will take my card which is connected to my father's account and some cash to by food etc. My parents will provide me with some money, they can even pay for me staying in hostel every night, that's not the problem - i just want my trip to be something like this. I have already read about right to roam and i know basic hitchhiking rules.
Also, in my plan about using father's couchsurfing account, i don't want to "book" houses or make any contact through the system, no. I'm just wondering wether there is a "map" on this website that allows users to see where there are couchsurfing hosts in particular city with their exact adresses given, so that i can go there by feet, knock the door, and if the host would be there, ask him wether he'll let me stay for one night (menitoning that i'm 16). This would be better than just asking people in random houses, because on couchsurfing i can see wether person is good (reference system) and if i just knock random door there might be paedophile living etc.
Also, camping sites and hostels with €20 per night are not really the best option for me, because that would cost a little bit, considering the fact that my trip would take me approx one month, and that i don't want to spend a lot of money.
I was asking about some free options like "search for houses with families or grandparents and ask them wether they'll let you stay for a night in their garage and use their shower".
P.S.: are there free public showers on my way (Germany, Denmark, Sweden, Norway)?