I think what it comes down to is you have a choice...those who need to work don't.

So if you feel you need to take her out then do so....but do remember you may need to go back on a waiting list & days will go to working parents & children who need crisis care first. So you may miss out all together. Also it's an adjustment & it could be harder at an older age.
This might be an easier way to adjust, it's good to rememver that she might be more advanced than those in her group atm...but isn't the next group 15months to 3yrs? It is here, and that can be just as hard for adjusting as some of the other kids may be rough & to full on for your DD (just a thought)..do you know what they are all like? They usually have to sleep on a mattress too do you think she is ready for that? I've actually asked for my DS to stay down as he has just adjusted & I want him sleeping in a cot a bit longer. Are the yards mixed? Where Charlie goes when playing in the yard it's with the next group & they often have activities together, they also usually do crafts etc with the Children so that's always good for them too.'
Otherwise I would say local playgroup is the way to go...a couple dollars, heaps of stuff you don't have at home and usually always a great mix of ages.