I have never participated in a fundraiser that DIDN'T require payment up front.
Around here, all fundraisers (schools, bands, churches, and scouts) require payment be made at the time the product is ordered. :001_huh:
I think that probably all packs have at least one family that sounds like the family in yours. It's not easy, but how we deal with it in our pack is that ALL pack meetings are the 1st Monday of the month and den meetings are the 2nd & 4th Mondays of the month. Period. Special events may be at different times, but that information is communicated very early....and plans cannot be changed just because 1 family cannot be there.
As far as awards....well, unless you are going home with him every day, then you don't know for certain whether he has completed the requirements or not. Many of my son's requirements have been met in the course of our homeschool. Of the requirements that we have completed entirely at a den meeting, I can ask the boys about it a couple of weeks after - they don't remember.