Firstly I'd just really get into riding your road bike and up the mileage. Then go on some over night trips and stay in a motel. For this you'll be able to carry stuff in a saddlebag or a backpack. See if you like it then you can set about upgrading your bike. I'd gear it down by installing a triple, maybe a 110/74 with 46/36/24 rings and a 12/34 cassette, then I'd put some wider rims on, but I expect there's not much clearance on the super mirage, anyway go as big as you can. If you are getting a BOB I think that's all you need to do.