Rides I have no problem with, however standing in line was a big issue for me. I purchased a seat/cane and that helped a lot. We also got the daily passes that allowed us to skip some of the lines. This chair is similar to mine: https://www.amazon.com/gp/product/B002VWJYT8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I've recently started working at a museum and I've seen people who cant stand for extended periods of time use this[ cane], maybe it will help(https://www.amazon.com/Drive-Medical-Deluxe-Folding-Black/dp/B002VWJYT8/ref=pd_sim_200_2?_encoding=UTF8&psc=1&refRID=7PYB35085JTTSWKHVSKX)
desperate times call for desperate measures
I don’t have an answer to your question, but I have a suggestion that may help: I bought this great cane chair a few years ago from Amazon and it is a big help when I’m in a POTS cycle.
The one I have is no longer at this link, weirdly, but this one is very similar: https://www.amazon.com/gp/product/B002VWJYT8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The original cane chair aI had prior to the one above one was more comfortable to hold, but was a pain in the neck to close and fasten every time I moved. That one is here: https://www.amazon.com/gp/product/B006JPYVRI/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Drive Medical Deluxe Folding Cane Seat, Black https://www.amazon.com/dp/B002VWJYT8/ref=cm_sw_r_cp_apip_8679wjM2j8fuf
Drive Medical Deluxe Folding Cane Seat, Black https://www.amazon.com/dp/B002VWJYT8/ref=cm_sw_r_cp_apip_8679wjM2j8fuf
Drive Medical Deluxe Folding Cane Seat, Black https://www.amazon.com/dp/B002VWJYT8/ref=cm_sw_r_cp_apip_8679wjM2j8fuf
They've had something very similar for quite some time.
https://www.amazon.com/Drive-Medical-Deluxe-Folding-Black/dp/B002VWJYT8
That one has a rating of 2 stars. This one is only $22 and is 4 stars.