Air brakes are typically used in most large trucks because this design simplifies the process of connecting the truck's cab to various trailers. However, in an RV, this is not an issue. Therefore, hydraulic brakes are fine. In fact, some RVers (including myself) prefer hydraulic brakes as a result of their proven reliability. Best of luck.
Jack
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2004 Winnebago Brave 34D with the usual add-ons
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