I've been to 6 games at Allen Fieldhouse. My wife is a transplanted Jayhawk. The doors open 2 hours before tip and my advice is to be there when they swing open. The GA is the left over student tickets and are mostly behind the baskets and a little each baseline. It is bench seating, no individual chairs. And prepare to stand A LOT. Also, the visitor's entrance to the floor is very accessible and I was thinking of hanging out down there to get some pics of Bruce and the team as they take the floor for warm ups. That is after my wife and in-laws stake out our seats.
Take the advice and fly SW to KC and drive over. It is roughly a 45min drive. Take the Kansas Turnpike it is quicker but is a toll road. It is a straight shot.
When you get to Lawrence, exit at the East Lawrence exit and go to Massachusettes Ave. There is plenty of eats and drinks there. Try Buffalo Bob's Smokehouse for some good KC style BBQ. If you have any specific questions. Feel free to ask!