Like stated, a weekend in either your or a friends driveway will go along way in learning the do's and dont's of camping... We had good friends buy their first camper and they toed it to our house and stayed in the driveway for the weekend...
Don't forget to shock the tires when checking the undercarriage... If the date codes are older than 5-6 years, you may want to think about replacing them before towing any distance.. Especially if the trailer has been sitting for a while, the sidewalks will go weak.
Check ALL the caulking and sealant around all openings and the edge of the roof and vents...
Joe