Well, wherever you stay, make sure that person files a TM 30 on you showing your registered as staying at that address and then when you're 90-day report comes up file your 90-day report at the immigration office that serves the area where you're staying.
yep, they are close BUT the way you can tell is the 90 day report receipt is now almost always hard printed on it's own paper, they don't tear off the bottom and stamp the next 90 day report date on it
believe it or not some offices DO require you file a new TM30 with them for domestic travel too 😕 BUT most don't, you have to check with your office and see what they say
how immigration offices handle TM30's insofar as whether you need to file a new one every time you enter the country or whether you don't is up to that individual office and their policy. With over 80 offices in the country there's a lot of variance as far as how they want it done