PurpleK

I plan to be touring in western Tennessee and eastern Arkansas/Missouri in September. But there seems to be very few opportunities to cross the Mississippi River. I can find only three, one in northern Tennessee and two near Memphis. All of these appear to be limited access freeways which makes me question the ability of a bicycle to cross the river out of Tennessee.

Anyone know anything about these bridge crossings? Is it legal or are there accommodations for bicycles to cross? If bicycles are not permitted, is there a shuttle service? Are there other crossings or ferries I'm unaware of?

Thanks for any help.