In particular I got an inflatable Sea Eagle 'kayak.' I put that in quotation marks because it is an open vessel that you sit down in, halfway between a kayak and a canoe, but the key is that it weighs about thirty pounds and is quick to inflate and throw in the water. I have named it the Raftemys.
I took the Raftemys out on the Schuylkill a couple weekends ago, putting in around Bartram's Garden, paddling up to Walnut Street, and then back down. I had initially meant to put in right before high tide, the goal being to paddle with the tide up and then with it back out, but I ended up putting in a little late and fighting the outgoing tide for a while before I finally got to turn around and take the easy way back out.
Dig the route [it is SO nice to go somewhere and be open about the location]:

The most common that I could tell (did I bring binoculars? Nope) were red-eared sliders (Trachemys scripta):
I was happy to see some map turtles (Graptemys geographica). Don't ask me why I'm happier to see invasive map turtles than I am to see invasive sliders. I get the impression the maps aren't pushing anything else out, and I think they're more elegant turtles, whatever the slider's subspecific name (elegans).
I enjoyed the scenery from the river. The tidal Schuylkill features a lot of old docks dating back to when this was a more industrially-active river. Here's an old railroad swing bridge:
Swallows zipped above me as I paddled, and they were thick as I came up along I-76 (in the left of the last shot above). Here are a couple swallow nests underneath the expressway.
Wouldn't it be cool to go up inside Mill Creek? I have certainly thought so, but I might be changing my mind. I saw the stream of mist issuing from the tunnel before I could see its mouth, the cool underground air condensing the heavy, humid, 90 degree air of the day.
Then I smelled and felt the air. These sensations conflicted, the cool breeze quite nice on my sweating, sun-roasting skin but the fetid stink of the storm sewer driving me past it. I can't say I won't ever hold my nose and head up the tunnel, but not on this trip.