The one thing I'd be concerned about is the combination of those relatively minimal shoes with the weight of your pack. With that much weight, your feet need extra firm support (not necessarily boots but a really stout footbed).

This is a lightweight gear forum and we'd call a 45 lb. pack for 3 days a bit on the heavy side. Unless, of course, you're sherpa-ing for kids and (like my youngest son) packing a heavy wet suit for cold water surfing!

For ideas on lightening up, there are some excellent articles on the home page of this site, left hand column.. You might want to compare the gear lists to yours. Mine is modeled on the 27-lb., 7-day gear list shown there.