Hi Cinzia
i can understand your worries about riding alone as a woman. i am a solo-lady-rider myself, just going the northern tier - lake erie connecter at present.
so far nothing happened (knock on wood) since i try to play safe.
no wild camping unless i am together with some bike pal.
night and darkness is a no go, try to find a place to sleep well before sunset.
try to go on bike roads, best on major bike trails, there people are used to cyclists and ready to help if you need help. if i have to go on major roads i often look into my rear mirror and if there is no road shoulder i tend to go a little more in the center of the right lane so i have space to back off to the right when the car or truck is passing and the cars make a bigger circle around you when they see you are going in the center. wear reflexive vests and make sure you are visible.
on the campgrounds i like to be in the neighbourhood of other people, just in case and i have a close look at the neighbours before i pitch tent.
have pepperspray and a loud whistle ready for chasing dogs or emergencies in the tent.
also i try to get as much information about the local situations as possible concerning traffic, animals etc. just have a look at the discussion about cycling and camping in bear country , there are lots of information and experiences.
wish you a safe and happy ride! dont let yourself be disencouraged, shit happens everywhere but if you play as safe as possible things will turn out fine!
so far, i have met so many friendly, forthcoming people on the road that it was a pleasure ride. yesterday i arrived at a campground. no food, no shop, supermarket 5km away. tentneighbour insisted (i didnt ask him) that he would bring me by car. was a hiker himself and knew how it is to go another 10km when you are already spent and tired.
there were others to invite me for dinner, breakfast etc. this is what i love most, meeting and making friends with all those nice, friendly and helpful people on the road and campgrounds.
take care and enjoy your ride!
Regina
www.on-bike.net