A few newbie quesitons

We'd like to build our own trailer but have a lot of questions.
We thought we'd be stuck with a big box until we found your site.
How do you get the wood to bend the way you want it too?
What type of wood is best?
What do you cover the outside with?
Do you seal your wood? With what?
How do you get things to safely screw into the walls when there are no studs?
What about the underside of the trailer, is it sprayed or sealed with something so wood wont get wet?
How do you get the back to open in close securely, do you just use regular hinges?
Do any of you have solar panels on yours?
Do any of you travel with small children in one of these types of campers?
We are justing looking for a sleeping area for two adults and a toddler so we don't need much but loved the shape of these. Thanks for your help.
We thought we'd be stuck with a big box until we found your site.
How do you get the wood to bend the way you want it too?
What type of wood is best?
What do you cover the outside with?
Do you seal your wood? With what?
How do you get things to safely screw into the walls when there are no studs?
What about the underside of the trailer, is it sprayed or sealed with something so wood wont get wet?
How do you get the back to open in close securely, do you just use regular hinges?
Do any of you have solar panels on yours?
Do any of you travel with small children in one of these types of campers?
We are justing looking for a sleeping area for two adults and a toddler so we don't need much but loved the shape of these. Thanks for your help.