Exciting! I've lived away for nearly 20 years and sometimes a reccie can be double edged. I've loved living in each of the different countries we've been in (in Europe and Asia) but I probably didn't like them or envisage liking them when I first visited. In fact, fortunately, we were already committed by the time we did our reccie for current place because I'm pretty sure I'd have said no and backed out but 7 years later, we're keen to stay if we can.
Main drivers for us post children have been schools, would prioritise seeing them, check availability of places ie you can get your children in for when you plan to move and ensure fees are covered by the company or affordable.
Have heard same about drivers being provided for India based roles, that's important as driving in India can be hair raising!
If you go ahead, make sure the company provide you with decent temporary accommodation for as long as possible (at least 3 months) so you can get lay of the land before committing to a place to live. Would try and see a couple of the temp options whilst you're over so if you go ahead you know which one you'd prefer. No point seeing perm accommodation options in such a short time and before you know which schools you're going for as it's usually the schools which determine the location of your perm accommodation.
Your relocation agent should organise for you to visit the schools you might be interested in but do your own research and make sure they include the schools you're weighing up. In some places, agents get incentives for taking you to see certain schools. I've had a relocation agent refuse to set up a visit for a school which was recommended to me, claiming they never have places, I organised my own visit and that was the school we ended up at.
We opted for a British style primary school although older one is now at an international secondary (IB one). How old are your children and do you have a sense of the type of schooling you would want for them? How long do you think you will be overseas? That's usually a factor in choosing type of school in terms of transitioning back potentially.
Could your husband's company put you in touch with someone from the company or a spouse with same aged children so you can speak to someone before the reccie for school recommendations and general overview? Maybe you could squeeze meeting them for coffee/drink/dinner when you're over?
Overall with only 2 days, I think it's schools which are the priority. Won't leave much time for anything else except hopefully feasting on amazing Indian food!
All the best and keep an open mind. Very hard to gauge a place in a few days. Plus India in particular is going to be a big contrast but it could be an amazing experience for you and your family!