Have you seen any of MK Davis' breakdowns of the footage. Based on the hair, the musculature, the breasts, the movements, I'm about 80% sure that a real creature. No way in hell that's a suit and especially not from the 1960's, we wouldn't be able to make one like that now probably in 2017. I'll post a couple of his videos and a link to his channel if you like. Some of his work with the Patterson footage is very good.
He has many breakdowns of the footage but for example in this one, check out the musculature of the animal throughout the video, in the back, in the triceps, look at the calf muscle at :24. that is no suit man.
Here is one where he looks at some specific frames, a really good one of the foot at :52, you can see the pad of the foot and all 5 toes. Look at the musculature under the hair around the shoulder blades at 1:29. If that's a suit its the best one ever made by man and it was done in the 1960's.
Anyway, here is the link to his channel, he has done a ton of work on the Patterson footage and you will find a lot of breakdowns for it. They are all well done.
https://www.youtube.com/user/Greenwave2010fb/videos