So I'm just back. This is gonna be a long post to give you the most info I can from when I was there.
I was at DHS on Tuesday Oct. 20, 2020. They didn't start letting cars in until 9am. according to the person just in front us in line at MMRR. They had driven.
The first bus left our resort at 9:05am (I was at Coronado Springs). When we got to the park (we didn't make that bus but got on the next one which got us to the park just before 9:30am) it was already open and the line was at 75 minutes for MMRR. Turned out to be only one hour in line for us although it looked really long.
Although I tried - we did not get RoTR boarding passes - the 10am was gone by 10am and 8 seconds. The 2pm boarding group was filled in less than that. I've got a brand new phone with 5G and was on the phones network and not on Disney wifi. There are just so many people trying at once.
Plus if that park is only at 25% capacity, all of that 25% were there that day. I'd gone in September as well and it wasn't that crowded. Ride waits were long this trip.
I wanted to add that I loved using mobile order - that's pretty much the only way you can get quick service food. We did blue milk with rum twice and got a ronto wrap each in Batuu. And then got a burger at Rosie's All American that we split for a brief lunch.
So my suggestion is to go in and ride the rides with short waits first - when we arrived only Star Tours (10 minutes) and Smugglers Run (15 minutes) and Alien Saucers (10 minutes) had short waits - everything else was an hour or more. The only exception would have been if we'd be among the first in the park - then do MMRR first.
I sure wished we'd gone ahead and done those short line rides first because it would have helped save time.
We basically spent all day in lines - Smugglers Run just under 2 hours, ToT an hour, MMRR an hour, Star Tours 30 minutes. We decided to skip RnRc (I don't ride it but my husband does). Slinky Dog was another hour, TSMM was 45 minutes, Alien Saucers was only 20 minutes thankfully because I'd have skipped it if it was longer. We did really enjoy our time on Batuu and in Oga's Cantina.
Even getting into stores involved waiting in lines.
Just be prepared for it.
Just so you know, ride times were up and down all day. We got into the Smugglers Run line when it said only an hour but it jumped up to 2 hours just after we got in line and it really was 2 hours - a few hours later it was back down to an hour. We got to see some back stage areas in Batuu since the line snaked through them. So we had bad timing.
We drove home that night (8 hours) so we left at 6pm instead of jumping in MMRR line at the end of the park day which normally would have been what we did if we were not driving home that night.
2nd add on - Uber can drive into the park - the problem is first thing in the morning they are stuck in the same long line of cars trying to get in so I'm not sure if that is any better than taking the first bus from your resort. Maybe? I'm no help on this question.
Anyways - have fun and enjoy what you can do!