Sienna vs Odyssey vs 3 Row SUV

In the next year or so we will likely replace my wife's '18 Forester with a larger vehicle. We understand the practicality benefits of a van, but we do have a few things to consider and are leaning toward the Sienna and wondering if we should get on a wait list now....

1) We live in the mountains so 90%+ of our driving will happen at 2,000 feet and above. Does anybody have experience with the current Sienna's 4-Cyl Hybrid at comparable altitude and how does it fair with its power delivery for things like highway passing, steeper grade climbing etc especially when fully loaded with 4+ people and gear?

2) Again, mountain life with camping trips etc. How do people find the Sienna on gravel, dirt, and unfinished roads in terms of ground clearance, bottoming out etc?

3) Would anybody here have chosen a Honda Odyssey if it came in AWD? My guess is Honda might offer this with the 2025/26 model when they move the Odyssey to their new platform.

4) I'd rather go with the van than a 3 row SUV like the Grand Highlander or Pilot or even a Lexus TX 350 due to practicality, purchase cost, fuel costs etc, BUT ground clearance for forest roads etc is a consideration, as is AWD for snow during the winter, and power for confident driving at elevation where turbo charged smaller engines sometimes can struggle.