CC&R dated 1973 says no RVs, trailers, boats can be stored

Or, after 3 pages of "don't buy the house" responses, research if the CC&Rs are still in effect (regardless of the ability to enforce them with no HOA). And make sure, if expired, that the CC&Rs or this particular restriction is not part of the zoning law.

I wouldn't tank the right deal on the right house until I knew there was an issue. You can get a nosy neighbor anywhere. One could move in the day after you do...