I have an Aire Tomcat solo...the smallest inflatable available. check their website as they have many sizes and models.
Aire is one of the best raft/infatable kayak makers in the usa...factory located in boise idaho... customer service is awesome ... I just went there and they helped me pick and choose what I really needed in a repair kit.
These kayaks are made for river running and are some of the best on the market.... it's the wee details that count ! I paddled mine on a lake as well and was impressed with how well it tracked.
self bailing has lashpoints all along the sides.
I'll be able to fit about three to 5 days worth of stuff in that space. ( my fear is small and light)
in the front is a recess for your heels plus I bought a thigh strap for extra maneuverability. you can also buy a foot block or make one but I didn't find it neccessary.
it is a double hull system... sort of like inner tube and tire. and you fix a puncture in a similar way. You can even buy spare inner tubes....although the outer shell is pretty hard and you'd have to run into some nasty stuff to do damage.
Inflates in under 10 minutes with a foot pump.... deflates easily and most importantly dries quickly.. Unlike the enclosed advanced elements which my buddy said is a pain in the butt to get dry.
The other inflatable kayak that was reccomended was the top eagle brand model... but it's more expensive, has a single hull.
I picked up my tomcat on craigslist. and saw several other offers for a full kit ( helmet, life jacket paddle etc ) for $ 500... mostly down portland and seattle. good paddles are expensive.