For $70 you can buy a sturdy two bicycle rack that fits in your hitch. I have one and it works well for me. As for extra space, I also have had a 24.1 for four years and I don’t remember anyone accessing spaces in the vehicle that are not being used. The storage is so good, that we did not really need extra even in our 4 month trip to Alaska. There is some storage in the water tank compartment, and you can put some soft things there. We use behind the couch for cushions, stepstools, etc that we use all the time. And, of course, there is storage in the drop down bed above the cab - especially if you have the blow up mattress. Other than that, most space is already being used for something.
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