Oh no! My DH is 6'8" - he probably has no hope to ride huh?
I'm not really sure what is the 'cut off' for issues on the ride. I've seen pictures of people who have said they were able to ride....some were around 5'6 and weighed 300lbs or more. I was THRILLED that they posted pictures. It helped me figure out that I will indeed fit.
I have also seen that 6'5 basketball players can ride too....so exactly where the problem lies with certain shapes? I don't know.
Regarding the bolded part: Can you post those pictures here? Or do you have links to them?
I went looking and found this long thread. Seems to be some pictures in it, so maybe it'll be helpful.
http://disboards.com/showthread.php?t=3282813&page=2
It may help to cross the lower part of your legs. There are a few older coasters that I've ridden where crossing my legs and perhaps tucking them back a bit has helped in similar situations.
Definitely do NOT put bags beneath your legs. I would try to put them under a child's legs (if they let you, they wouldn't let me one of the times I rode because my child was then unable to bend her knees at a 90 degree angle???). If you can't do that, put them on top of the bar....they really won't go anywhere, just hold with one hand or put a leg through a strap, etc. I don't think I could have ridden it with a bag under me, but I knew from the DIS that I shouldn't attempt that.
I think the issue is a bit overblown as it seems 99% of people can ride from what I've seen.