Our ceremony is in a national park reserve and as per our agreement with Parks Canada, we are allowed a maximum of 10 chairs for guests who are unable to stand. Now, we expect to have anywhere between 50 and 80 people attend the wedding. I know it's probably rude not to have chairs for everyone, but we are just not allowed more. Should I mention this at all in any of the invite inserts, on our website or not at all?