Jack, you will find something that will work for you. Also, IMO that's the kind of thing Jayco needs to hear as customer feedback.
The person who checked-off on the design probably wore a 40" sleeve, and was as agile as a snake. We have all had to work around design issues.
Edit: It might be easier (in the end) to relocate the valves than create access from the outside. Or, you mentioned earlier, modifying something inside so you can reach them.