Length has shrunken over the years, also. It used to be that 2,500 - 3,000 was about standard. Now, most editors will cut or demand no longer than 1,500 - 2,000 for most, with exceptions.
Just remember that it will be almost impossible to sell a "Me and Joe Went Hunting" story, as they're called. There has to be a technical, product or specific interest angle to a freelance article. I, for instance, concentrate on reloading - and often use an unusual or older cartridge as the "hook" to generate reader interest.
As always, a good selection of sharp, well-composed photos is either an asset or required. As are proper grammar, spelling and punctuation!