Hi Sue,
Welcome to shopping! I began shopping again a few months ago after taking a break for a few years due to work and time. So, basically I am starting over. One company I have had good luck with is Corporate Research International, I believe the website is www.mysteryshops.com
Have you considered doing merchandising? It's totally different, but steadier, and may pay better. A good site for this is Market Force (Certified Field Associate) www.marketforce.com
I too live in a smaller town, and finding companies that service this area has been daunting. I am signed up with lots of companies, because you just never know when them may have something in your area.
To get yourself established, and get your rating high, you may want to take some shops that don't pay much, just to show the company the quality of your work. It's like any other job, you have to prove yourself before you get the choice work.
If you need any help getting all the paperwork involved with shops organized, let me know. I have developed a method where I can keep it all together, at my fingertips, in one binder I can carry with me. I'll be happy to let you know what I've done so I don't tear my hair out trying to keep track of companies, shops, status, pay, etc.
Good luck shopping!
Debbie