I am getting married in August and am doing the same thing!

A few of our vendors accepted cash only because of the credit card charges. I found two ways around this. I either negotiated the credit card fee waiver into the vendor quote or I was able to convince them to use amazon payments which allows you to pay up to 1k a month with your credit cards and without fees.

If not obvious already, you and your future spouse can both sign up for the same card and use amazon payments on separate accounts so you can hit the limits on both cards more quickly.

Hopefully, that helps!