Well you can tell them I had a friend once who finally agreed to marry a man who'd been begging her for years - on condition that he gave her the wedding of her dreams, all to impress the worthless young man who'd jilted her for her best friend. (He would see it in the local paper, you see). The wedding was in Yorkshire, and I stayed in B&B. Now I went out to look round the town the day before the wedding, and got myself hopelessly lost. I was lucky enough to bump into her intended and asked him the way back to my B&B. He said he just had to see the hotel about the reception, we would have a quick drink and then he would drop me off back at my B&B. So we did just that, and over the orange juice, he told me he'd had to borrow thousands of pounds to pay for this wedding, and he'd just as soon have just got married quietly in a register office. He added that he didn't like being in debt and would have to work 18 hour days for six months to pay the loan off but he would do it.
Six weeks after the wedding, I got a letter from the blushing bride telling me she had left him "because he doesn't have time for me"! I wrote to her and told her that was a wedding, not a pantomime, and that the reason he had so little time at the moment was because he was working to pay back the loan for the dream wedding she wanted. I never heard from either of them again, and I don't know if she went back to him. I am certain she never loved the poor man in the first place.
That's why I think it's so important that you do know why you are getting married. I have nothing against a big splashy wedding if that's what you both want and you don't mind paying for it, but if it's just a day out for the family then just throw a particularly posh barbecue as far as I'm concerned, because divorce costs an arm and a leg too!