Ken, there are typically 2 types of suckers that are common to the upper thames (London, Ontario)... unfortunately the species that you have listed are not commonly found in this region. I don't usually catch too many redhorses ... most recent was about a week ago (shorthead redhorse).

This fish was caught in the springbank dam area of the thames river in London.
Here's a study that was performed for the area and I would expect the same conditions would apply in dam areas stretching along the upper thames reaching from Woodstock to Chatham, Ontario...
March 2010 Migration Study -
Migration phases: An increase in the mean number of passes and the mean number of days spent at the dam for white suckers (Catostomus commersonii) and shorthead redhorse (Moxostoma macrolepidotum) indicate that these two species now spend more days at the dam than they did in the baseline year.
Visual observations demonstrate that this may be because these two benthivorous (bottom feeding) species now spend time at the dam consuming algae and invertebrates off of the new gates.
Ref file:
http://www.clear.london.ca/pdf/Springbank_Dam_March11.pdfAs far as white crappie go ... I personally haven't fished for these in years. There have been reports of crappie in local ponds
(ie. Pondmills pond in London).
I've also heard of a place just outside of Aylmer, Ontario that is quite popular...
Springwater Conservation Area near Aylmer routinely produce big bass for anglers with the patience to learn where the fish are. The Springwater pond, in particular, produced a Canadian live-release record largemouth bass. Small ponds such as these are also packed with panfish such as bluegill, pumpkinseed, and
crappie.
Ref: file:
http://www.ruralroutes.com/orr_city_page.cfm?city=Springfield Good luck with your search Ken and thanks for uploading the pics .... droolin' !!
~dokdok