I lift at my University's rec center, it's a multi-million dollar facility so I don't blame them for banning chalk. It sucks, but I deal with it. I'm doing 5/3/1 at the moment, and I only use my 'lifting straps' for my last set on deads, which is balls out as most of you know. A guy was kicked out the other day for sneaking chalk in, he's been warned a couple times before that I guess.
I don't feel that my grip has weakened at all by only using lifting straps for my last set of deads, I've been doing 5x10 of chins twice a week to try and get that 100+ recommendation Wendler has set. Don't use straps for that, or hanging leg raises.
All that stuff listed in your link seems pretty expensive when you can just buy straps for $10-15. Plus, if employees at your gym see you leaving traces of this shit behind I'm sure it's going to piss someone off. It worth it to get kicked out mid-workout just to smuggle this shit in? haha, I think not.