National parks honeymoon, or resort/ adventure combined?

Has anyone done a national parks trip/hiking honeymoon? Which parks would you recommend?

We are on the east coast and would like to get as many in as possible without it being too much, over 8-10 days.

I have been to the Grand Canyon/Sedona twice but my fiancé hasn’t, so an idea incorporating them is nice, but not necessary bc I feel like you can easily do those on an extended weekend trip.

Not super interested in Zion, arches all that bc most of all we hate crowds.

I have thought maybe grand Teton, Yellowstone, maybe something else?

Or southwest w a brief stop at Zion and Grand Canyon and over to California.

Or maybe a Northern California/Pacific Northwest focused one. Not looking at Washington state necessarily bc My aunt lives near Mount rainier in Washington so that’s another trip we could take as not a honeymoon.

Anyway if you have done a national parks trip, please tell me about it?

Also, I’ve considered like Costa Rica or something like that where you stay at an all inclusive and then move to more of an eco tourism. Basically while resorts are nice we don’t want to do that for ten days.

Appreciate any tips!

Oh and we would want to go in may-June or sept-Oct 23.