Hi Phil, Looking at the plan of your Arizona and size of awning it was the same as our Bordeaux. What make and size of awning are you useing. We used a Dorema Sirrocco size 12 and we had no trouble getting the roof tight. If we are talking about the same piece that folds in against the caravan and obstructs the loo door, on ours it made no difference to the roof tension if pegged or unpegged, as the side of the awning is pegged anyway. All I can suggest is to experiment with the position of the poles against the caravan. You say your on sloping ground, with the caravan level you will need to pull the awning through the rail further to one side to compensate. Without actually seeing your set up it's a bit of a job to give you an accurate answer.