I would be very surprised if 140w didn't cover it if you had "nice sunny days".
I would buy a good quality MPPT regulator (NOT a cheap one) like
This one. (I have the same unit and a 120w folding panel, we have 150Ah storage, charge laptops(2) ipads(3) ipods (?) run led lights, and usually power several other family campers too. the big difference is we have a gas fridge, but our batteries are usually fully charged by 11am. this is Victorian summer conditions.
The good thing about that reg (in your case) is it can take up to 260w, so you could add more panels later. If you do go for a "proper" MPPT regulator, make sure you get your panels to run at 24v if you can as this helps heaps with the voltage drop over the cables from the panels and allows you to place them further away in the sun.
Cheers,
Fraser
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