i have a rockwood 8315ss. i have it at a seasonal site also.it is supported under the double axles by blocks and lengths of 2"x8" board keeping the trailer load off of the suspension and wheels. it is supported front and rear by the cantilever jacks. it has been this way since we put it on site in 2009. i occasionally snug the jacks as the pads they are on settle.
2008 rockwood signature ultra lite 8315SS[SIGPIC]