Choose a base for your camper. You could choose to build your own, but three of the easier options include an old truck that still drives and can be used to create an RV-type camper (a permanent fixture on the vehicle), an unattached truck bed with a hitch connected to the front or a cargo trailer.
Determine the allowed weight. If you are using a truck, the bed will have a weight limit you will need to follow. For the camper-truck bed or the cargo trailer, you will need to follow the towing guidelines of the vehicle you will use to cart it around.
Design your camper next. By following the predetermined weight guidelines to configure your camper within your base, you can easily create the rectangular camper-shape for your new travel home. If you are familiar with a CAD program, it would come in handy here, although it can be done with simple pen and paper and proper measurements. There are several free pre-planned designs available online to use as blueprints or to help guide your plans.
Purchase your supplies. You will want to use very sturdy materials, and generally 2-by-4s are a great option. Remember, you will be sleeping in this camper, so you will be building it similarly to the way you would build a shed or a home. Your basic camper will be framed in by 2-by-4s and then covered by plywood. If you are unfamiliar with building and framing techniques, it will be worth your while to do some research at this point.
Design your interior. Other than the bed, which is a staple, additional items in your space are optional and subjective. If you like to play cards, a built-in table may be the best option for you. If you want to ensure you can use the restroom inside, some form of composting toilet or port-a-potty may be an important use of your space. Think about what you will be using your trailer for the most and fill it in accordingly.
Finish the camper. Seal your seams and paint the wood with a weather-resistant paint or sealer. You will want to caulk any edges to prevent moisture from seeping in and damaging all the work you put into your new space.
Move everything in. Now that your camper is complete, it is time to move in the bed and all other interior fixtures. Make sure everything is securely fastened for the journey, because things will shift around a lot while you are driving.
Make changes as necessary. Once you have tried out your camper, you are bound to find things you wish you had included or items that are just in the way. Take a notebook with you to keep track of difficulties you have while using your temporary room.
