Congrats on your legal ceremony!! You both look so happy
The tables issue, that would be one thing I would not budge. I know he might not see it now but he will once he gets there and sees everything set up. Do not give in on this one haha. I agree with @calgarybride2015 that it will be too cramped with everyone on those little tables. Plus it makes it very hard to feed children and babies when the kids can't even reach the table. Another logistics problem is women wearing heels. I would hate to have nowhere to sit for 6-8 hours.
I can't even count the amount of times Juan told me that something was an overkill or it was silly, only to admit that I was right when he saw it all put together. So hang in there, dig your heels in and just tell him that this is how it's going to be haha. Men have a tough time seeing the big picture for weddings and what they think might be "practical", actually isn't when it comes to weddings. Sometimes, while they might not agree, you just have to tell them that you know what you're doing and there's a reason why you can't compromise on this one specific topic. He will come around and I'm sure.
PS: @calgarybride2015 high chairs are the worst!! haha My feet get so swollen and numb after a while lol. Short girl problems I guess