we plan to utilize Debbie at
http://casualcairodetours.pyramids.net/tours12.htm
for at least a full day tour--probably the Cairo Museum, as well.

I understand it's very easy to book last minute cruises/air on arrival.

As soon as I know anything concrete I will share more.
Take a look at good advice from valued tripadvisor, Wendy Cairo destination expert
http://www.tripadvisor.com/Travel-g294201-...commended..html