Girls don't stress about booking flights and accomm. I stressed and carried on with our first try and got nowhere, a big fat BFN. Our 2nd try I had a melancholic 'see what happens' nonchalance about it all, and it worked - I am 6mths pregnant with twins.
You probably won't get your plan until a couple of weeks out. We got our confirmed treatment plan on 30 Oct and flew into CT on 14 Nov.
We had only one weekend where we could be in CT for our 2nd try, which gave us a 7 week window, go to whoa, to cycle. Luckily DH left a sample with CFC on our 1st visit, so we could use that instead of physically being there on EPU day. I did my lining scan here and sent it to CFC. We flew in on Saturday morning in case they needed a 3dt (and didn't) went back in on the Monday for 5dt, flew out 6am Tuesday morning. CFC were very accommodating and worked it in around our EDs uni exams and all.
This may be the 1st time you're doing a cycle, but relax, CFC do hundreds in any one week. They will guide you. Give them a firm date you want/need to be in CT for your 5dt and they will work backwards from there.
Once you get your plan, just jump onto AirBnB and scope out some cheap accomm. They have ones that are 'instant buy', pick one of those and you are done. We got a lovely apartment in the city for $40AU a night, and a great one a block from the beach in Sea Point for $48AU. Read the reviews to make sure others were happy and you can book with confidence.
Good luck and baby dust to all.