I recently purchased a 16' 2006 Scamp.  In inspecting the rivets it appears that the caps are all at the end of their useful life, and several rivets are either loose or crooked.

There are 8 sizes of rivets sold on the Scamp site, and I've read that you shouldn't take more than one out at a time.

Without knowing the size / length of rivets to get, is there any general guideline for how many of which size you'd need to order to replace them all?  I found this discussion which seems to indicate just 46 and 66.  

I'm fine with ordering 50% too many, I just don't want to have to make 10 round trips to get what I need.

Thanks!