I use chains on all four corners, sometimes criss-crossing the two in the back. I slip the HST's range selector between gears and use cam-over binders at either end (w/johnson bar) to take up slack and adjust position. Range selector goes into 'low' & brake is locked. Binder handles are lashed down with ... binder-twine. (natch!) This works ok for the little guys (<4000#?). I confess to anchoring the fronts by the loader crossbars, since mounting bolts are torque-checked at every greasing and I'd hate to gamble yanking on the axle if I got rear-ended. I bet could drive it off ok with a bent loader, ... might not try to with a busted f-axle housing, iffy steering, and 90wt pouring on the wood deck. (No minimum speed requirements that I know of, but I drive like Grandma all the time ....)
Anyway, IMO there might be more angles/tricks to using straps the best way than chains (if there is a best way), but shortening 'em and adding anti-chafe extensions is a great tip. (Thanks!) Might have to tweak mine & try 'em again. Left to that, I'd want wheel chocks in there somewhere too 'cuz I'm usually more cautious than confident. I can't imagine using a come-along to anchor anything heavier that 1/2 its capacity. Straps seem to be rated much higher, but I don't know if the ratchet mechanisms are as tough as that implies. If the OP gets good dope on 'em I'll be taking notes.