I applaud your investment in solar, but those panels were very expensive with respect to $/watt. They should do fine at keeping up with parasitic draws but have a hard time achieving a meaningful recharge on a daily basis. At the most, you'll see around 6 amps under ideal charging conditions. So estimate 6A * 4 hrs/day = 24 Ah/day harvest, sometimes more but usually less. Therefore, I'd keep them as a portable kit that you plug in during camping or storage. An advantage of keeping them portable is that you can park the camper in the shade and set the panels up in the sun. You can also relocate them throughout the day to maximize harvest. With a roof-mounted permanent install, you must park in the sun for them to work. Longer wire may make your panels more useful but keep in mind that this will add resistance which will cause voltage loss in your solar harvest. On a permanent install, the goal is to minimize the wire length between the controller and batteries in order to minimize this voltage loss. You can counter this resistance by using larger gauge wire.
For a permanent install, aim for a minimum of 100 watts per battery. For a smaller system like 2 batteries or less, aim for even more watts per battery because you'll be more dependent on the daily harvest to get through the next night.
I'm not in Canada so I don't know the shipping hurdles or pricing comparisons. But I have bought my solar panels from Solar Boulevard with great results. At least this might give you a good idea of a $/watt pricing scale for solar purchases. If buying several panels, then there is money to be saved by buying higher voltage panels (less $/watt) and using an MPPT controller (more expensive than a comparable PWM but that cost is offset by the savings with the higher voltage panels).