A road side assistance plan is cheaper than a spare and it doesn't take up any space. Beside, if you do have a flat you don't have the tools to replace it and will have to call for assistance anyhow. As I mentioned in another post you will want a portable grill, folding chairs, small folding side table, outdoor mat. You should also have either a compressor or air lines to tap into your on board compressor for your tires. A 7 ft folding ladder, only way I found to clean a curved windshield, squeegees just don't cut it. GPS, iPad, IPhone or equivelant, and most importantly, a sense of humor.
You should also consider a TPMS as finances permit.
Paul, Kathy, and Tux a 4 month Mini Schnauzer
2014 Tiffin Phaeton 42 LH, 2013 Honda CRV
"When the time comes to look back, make sure you'll like what you see"