Inflatable PFDs

I've got some Bass Pro points to spend, and I'd like to get an
inflating PFD.

I could use some guidance.

I'd like to use the vest for wading and for boating. Question: Does
anybody use PFDs while wading? Sometimes, I canoe to a spot to wade,
too, so it'd be nice to have one for both.

Usually, though, I fish from a bass boat.

I'd like to get one that fits all those situations, but I wonder
whether people have problems with auto-inflation while wading.

I'm thinking I want an autoinflating one (one that inflates when wet)
in case I bonk my head and fall in, or vice-versa. Don't know how often
that sort of thing happens, though, so I wonder if it's worth the extra
trouble of having the sensor, vs. just the rip-cord.

Thanks,
Jamie