Yep, best place to start will be to contact the local realtors - I forget now exactly which ones deal with rentals, there are only 2 or 3 of them that do (realty companies that is). When we were looking nearly a year ago they were extremely helpful, a couple of them put together big packets of different places to check into. Unfortunately none of them panned out anyway because not a single one would allow our pets (2 medium sized dogs, 1 cat), which is just as well because at that time we found out we could make a mortgage payment cheaper than a rent payment even on the run down places. I don't know if prices have dropped significantly since then but back then most of the places we checked into were $1200/mo. average. Some a little bit more, some a little bit less, but right in there. Trailer parks were not an option - nobody NOBODY had any lots for a trailer or any trailers either. The only one we found with space is whatever they call that new one by the interstate, they had one opening but several applications already in for it. Maybe its changed in the past year, I'm sure the realtors would know better.
Another place to check is on craigslist, I know back when we were looking there were a few that advertised their rentals on there. The Sheridan Press Classifieds are free to look at online every day, and the Country Bounty is free to look at online too every week. Free resources, might as well use them.
Sheridan Press Classifieds:
Classified Ads
(D'oh! Just realized rugged already got this one)
Country Bounty:
The Country Bounty