My ILs disapproved of me from day one still makes me laugh now, but 10 years on I get on incredibly well with my MIL and just accept that she is married to FIL!!!
We had small wedding only 33 guests, basically parents, my sisters were bridesmaids and my best mate was my chief - all wanted, sister in law was bridesmaid (only compromise) and the rest of our guests were our closest friends.
We had soooo many problems with the ILs that my parents actually advised us to run off but we didn't want to deprive my parents of the day or our friends so we didn't. Did everything the way we wanted and have no regrets, had the best day ever.
Didn't have the traditional top table, had my parents to my side and my DHs parents to his side. You could just have your parents flanking you both with your bridesmaid and best man. I think these days anything goes.
Don't invite ILs if it will spoil your day, you will regret it. Horrid incident where my sister in law invited her unstable brother in law who spat in a girls face then started a huge bar brawl, (they are now divorced) but to this day it is remembered as a lovely day "a shame about the police having to attend"
Not sugessting yours would end up like that but don't let anything spoil your (fingers crossed) once in a lifetime wedding.