10ft wide isn't that much. Bamboo could send rhizomes through the damp soil underneath the creek for a submarine attack onto the neighbors. Just chose your bamboo wisely. Some that are known to tolerant damp conditions.
Phyllostachys atrovaginata
heteroclada
rubromarginata
bissetti
sasa palmata
psuedosasa japanica
and probably various others.
But, even though bamboo could be considered one of the most vigorous plants on earth, a child could contain one.
Remember, a hand with a shovel in it is alot quicker than a rhizome traveling in the summer

how deep is the water? And is it empty in the summer?

No, this "creek" never dries up. It is very substantial. 10 ft across and a foot deep (of water!) is probably an underestimated year round minimum.

I'm surprised at the suggestion that any bamboo would traverse it. But, then, I'm continually being amazed by new and unusual facts about bamboo these days!

Most running bamboos can take periodic immersion with deposition of up to a foot or two of sediment (i.e., floodplains) with no problems, but they won't tolerate permanantly saturated soils (i.e., swamps). There are a few species, such as Arundinaria tecta and Phyllostachys heteroclada, that are said to be able to grow permanently in water up to a few inches deep. A. tecta can be found growing in seasonally flooded areas on the coastal plains, but I don't know about in permanently standing water. I have seen where a bamboo rhizome crossed a creek through the interior of a rotted log that fell across the creek.

Thanks, Mike.
I had considered that I would have to be careful of rotted logs or other silt collecting debris that might bridge the creek.

SO, in your best estimation, do you think I should be okay with a bold creek of this depth even with the Incense?

I've got my finger crossed now that they will have the P. aureosulcata 'Harbin' to fill my order so that they won't have to resort to the alternate Incense, but you've made me think- we have a place known as "Cane Creek" nearby where Arundinaria of some type grows wild and from many vantage points you can see a clear break in the growth where the creek runs down the middle. Thinking of this has reassured me somewhat. Hopefully, Incense Bamboo can do no better. I could wonder how the Canebrake got from one side to the other, but will assume that it was either by seed or beaver dam given that this species has been around for quite some time in my area.

I'd like to see that experiment put to the test with a mature grove of Moso in China or Southern US.
Sorry.... just thinking out loud.