Thank you for the very helpful suggestions.
@Bob:
How exposed are the exposed areas of the High Loop Trail? Do all the exposed sections have hand rails and is there any scrambling on all fours? Would you avoid hiking there the day after rain, in terms of mud/slipperiness? Asking in particular because we have friends who want to go of different experience levels.
Of the two entrances to park, is there one side that offers nicer/easier trails to access the High Loop Trail?
Which caves are worth exploring, and do you recommend bringing light water shoes?
How long do you think the wildflowers will still be out in force in the park?
We've bumped into many rattlesnakes locally, including a super cute 12 in. little guy (have to add the photo to UL creatures). Interestingly it's the little ones who can inject the most venom and often their rattles aren't fully formed so they can't warn you. Also one of our favorite hikes near NY, MA and CT, Alander Mountain, has one of the largest rattlesnake dens in the NE. You can see some huge ones out there.
@Michael:
Any advice on the best parts or sites in the park camping area? Any parts/sites to avoid?
What is the "Indians" area and how far is it?
When do the caves close for the season?
@Marc:
Distance to us aside, do you have a favorite entrance to the park?
I'll check out Chalone Pk
@Bill:
How brushy are the trails up to the High Peaks Loop? Bushwacking brushy? And how exposed? Are the trails up to the High Peaks the same level of exposure/brush whether accessing from E or W side of the park?
@Ken:
When does the weather usually start getting prohibitively hot?