1. I am organizing the hunt I set the rules. I don't mind suggestions but keep it on track. 2. It is a SxS vintage shoot. If you would like to bring something else then you would need to go somewhere else. 3. Shells are a problem. Non toxic is required. First there would only be one type of shell. We would need to settle on it soon so I could get the proper permits and import the required amount for the shoot. I budget 2.5 boxes per hunter per hunt, but with SxS instead of semi's perhaps 2 boxes per hunt. (Don't believe you will shoot less even if you are a well disciplined shooter.) You could bring our own but it wouldn't be enough. Import is limited to 200 per hunter. Calculate based on my hunts which are 3-day/5 hunts and you have the opportunity to limit on one species per hunt excepting snows. (In Alberta we can hunt all species both morning and evening so you get 2 hunts per day and 1 on your last day) Daily bag limit is 8 dark geese, 8 ducks and 50 snows. 4. There are no gunsmiths for vintage guns in close proximity. I suggest a backup gun but is needs to be a SxS. 5. Weather is unpredictable. It can be 75F today and tomorrow 25F and snowing. 6. A group is minimum 4 max 6. I can take two groups at one time. 7. Where I can hunt there is minimal upland game. Not enough to set up a guided hunt and you will be too tired.
Hal, I have never heard of two boxes per gun per vehicle.