Hi, I'm an amateur photographer and am looking for a folding e-bike that will allow me to get out and do more photography (I have severe arthritis in my legs which makes walking any distance difficult but I have no problem riding a bike.). I have pretty much decided on either the Mariner or the RadMini as both have the main characteristics that I'm looking for, folding, fenders & rear rack. My question is: does anyone have experience with the Mariner on gravel roads and trails? I need a bike that handles reasonably well off pavement as I will typically be carrying camera equipment that is worth a lot more than the bike. I'm not looking to ride single track or any terrain that is particularly challenging as I did enough of that in my younger days. Thanks for any thoughts or advice.