Great conversation and a couple of things I hadn't considered. Please keep the ideas coming.
Here are a couple more details I had left out. This is public land. I can't build anything or feel good about leaving anything. Although I like the inflatable canoe or raft idea.
I do hunt alone and being safe is a major concern. I hadn't thought of bibs filling up.
I have some cheap hip waders. This is definitely too deep for them.
I have a jet sled. I would float a deer back across, but doubt I'd stay dry trying to get across myself in it.
I'm not afraid of getting wet. I'm thinking about colder temps.
Due to the vegetation on both sides and the walking distance to get there a canoe or kayak are not feasible.
If flotation and wading are out then you're left with looking for another place to cross. Are there no shallow spots above or below an "S" curve? The animals are crossing somewhere so maybe find the trail that crosses & use it?