Lots of time over these Thanksgiving holidays to peruse through old maps and such!
I pulled out a Denison quadrangle topo from 1901 and noticed various crossings across the Red River.
From west to east in the quadrangle, there were:
Delaware ferry
Stillhouse ferry
Willis ferry
Bounds ferry
Henderson ferry
Thomson ferry
unnamed ferry near Preston
Rock Bluff ferry
Bears ferry
MK&T railroad bridge(shared with SL&SF)
Colbert bridge