Well, the program looks reasonable but that depends on the caliber of the players. How much is too much depends on the level of the players, so I can't really know, this is hypothetical.
As a general rule, I use an 80/20 ratio; I usually choose a piece of music that the band can play reasonably well 80% accurately on the first read and then devote the rest of the time (relatively) bringing the remaining 20% into shape. Then the overall pacing of the entire program has to be taken into account, so you might want to give the band a little rest with an easier piece, while challenging it with a more difficult piece.
BTAIM, I would never have that kind of schedule, even with a professional band. Because of resources and logistics, I can see why the schedule was so intense and compact, but even in those circumstances, I personally wouldn't have such a schedule.
And congratulations on your selection to play in that band. What a wonderful experience and opportunity.
As an aside, did you run across Les Muncaster?
Also, for those that are sight challenged, could you considering breaking your posts into smaller paragraphs? Thanks.