Stop routine for fam party?

[NewAndTired]

DS is 11 weeks old on Friday and Saturday is his granddads 60th birthday get together. It's at the local village pub and will have a fair few people.
DS usual routine is a bath around 7:15/7:30, then into his sleep suit, dark room, feed and then sleep. He usually goes down for around 3/4hours at that point which i am happy with.
However on Saturday the party starts at 7pm. I have already agreed with DP that we will only stay to 8/8:30 depending on DS but I am in two minds as to what to do about routine.
Should I bring it forward, say at 6 and hope he sleeps for the time we are there or do we skip the routine and hope that when he get home at 8/8:39 he won't take too much to go down and still sleep relatively okay?
I'm worried about him being overstimulated being around so many people so not sure which is the best route?

At that age I'd just take baby out and put them in the pram to sleep. The world doesn't end if you change routine. It's not good to only get your dc to sleep in the quiet and dark. They should be able to sleep wherever.

DS can sleep pretty much anywhere, I just meant at his night time routine that is what we do.
He's good at sleeping when out and about in his pram if he's tired but sometimes can get engrossed in what is going on and keep himself awake by looking around

DS is same age. I’d just move the routine to later personally. If we are out later than planned DS tends to sleep better because he is so shattered. This annoys me because I tell DH it’ll interfere with his routine and it hasn’t yet. I think they’re still flexible at this age. FWIW we chose not to put anything in his routine that we couldn’t maintain or couldn’t be done anywhere but that’s in part to PIL not having a bath.

At around 5 months we went away for a week. Our evenings were sacred as we had a non napper (now we have two) so when we went out to dinner we did bath, bottle, bed at our villa, then transferred her to her buggy in her Sleepyhead, covered it with her Snoozeshade and turned the white noise up full blast then walked her to a restaurant and sat outside. Normally bought us 4-5 hours. One notable evening she slept through a lengthy three course meal with coffee afterwards!

Had we tried to do that during nap time we’d have been stuffed.

As everyone else said, I would go see how it's goes and just pop them in buggy at bedtime making sure they in pjs etc. Then when baby wakes I would probably go home and then feed settle and go bed. Its one night x

He is pretty young to have a routine anyway so it probably won't make a lot of difference. I would try and put him down at the usual time just in his pram, and if he won't go to sleep then do the routine when you get home.

I would enjoy the family get-together and not worry about the routine. If your DS is unhappy then take him home.