We will be going to universal/ioa in July 2022. We will have 2 to 3 days there with park hopper. We are going to do 1 day of fast passes (the park hopper one). Should we do the fast passes the 1st, 2nd or 3rd day? Get our barring under us the 1st day and use the 2nd day? Also, what rides are must do and is it possible to do all the must rides in both parks with a fast pass in 1 day? I figure july is going to be hot standing in line and lots of people but can only do fast passes 1 day. Suggestions please
Depends on what you and your family will consider "must dos".
For us, I think I'd put the must dos as (in order of how I'd ride)
IOA - Hagrid's (no Express), Velocicoaster (no Express), JP River Adventure, Kong, Spiderman, Hulk. For first time visitors, I'd add in Forbidden Journey (it makes us both feel not-so-great, so we skip it on most trips) - can be added anywhere around the Hagrid's/Velocicoaster/JP rides.
USF - Gringott's, MIB, Mummy (but it will be closed when you are there), Transformers, Rip Ride. If you like shows, both Horror Make Up and Bourne might make that list, too.
If you have an HP fan in the group, riding Hogwart's Express
both ways might be a must do, too.
I'd also recommend what others have said - price it all out, look into an Annual Pass for the potential hotel discount at one of the Premiere resorts that include Express.
If you end up with 2 or 3 days and only 1 with Express, I'd say to either get it on what will be the busiest day (like a weekend day) or your last park day. It wouldn't be fun to stand in standby lines
after you've enjoyed whisking past them in an Express Line.