Our little uns absolutely LOVE camping, as do I. Been taking the youngest since 2 months old (eldedst since he was ~ 8 months).
Eldest is now 3 1/2 and he often constructs a "camp site" in his bedroom 🙂 🙂 🙂
Just make sure you don't take too much of a risk if the weather is looking poor (it is supposed to be fun after all, rather than too much of an endurance/survival feat).
Also consider an all-in-one waterproof suit for the little-un if they're crawling, as it can become quickly tiring to try to keep a rug rat clean / dry.
I presume there are 2 of you? Get ready for a lot of work, as one of you will have to keep the nipper away from hot/wet/dirty things while the other does all the camp faffing. (At 9 months IMO 1 person is not enough to cope with all the work)
Fun though!!!!!