I would like to investigate my options for mounting the Oktava before I receive it.
But that would require some pretty long extension cables. (Unless they are ok with the cable coming down in front of them).
What have people done in similar circumstances?
The CLAMP thread should help you with that aspect. As far as your cable question:
You can never go wrong with an extra set (or two) of cables. We have a set of 25 footers on top of the cables kindms has permanently attached to his rig (maybe another 25 feet?). I used to carry another set of 50 footers just in case you have to make a very long run. Since you already know the setup of their tent , you could figure the actual footage and have one of the cable makers on the TS make them "to fit" for you.
Have some fun with those mics! kindms LD mics are fun to run and that LD sound can be very pleasant!