It certainly wasn't a long term solution to her constant problem of finding a place to keep out of the elements. Until she knew how she was going to escape the country completely or until she decided to stop running and return to the fate that was awaiting her in Hogsmeade, she had to keep moving. The unsuspecting owners of the home she was hiding in might not notice her for a few days, but she couldn't get too complacent. If she wasn't careful and stayed too long, she would be discovered again.