Yes you are correct it is a good idea. Also you are correct that there are cheaper Gap insurance providers out there. You have to be careful about who underwrites these cheaper policies though. A lot are underwritten by companies you have never heard of. click4gap is underwritten by a "Red Sands" a company I have never heard of, not that I'm saying they aren't going to be reliable in the event of a claim. They are based in Gibraltar. Here is the web site address
Red Sands Insurance
It's just I would feel better paying a little more for a policy underwritten by someone such as AXA insurance, but as you say each to their own.