Stored cap voltage

[DreamTheater]

I want to remove the chassis from my tube amp and inspect the insides. What do I need to concern myself with as far stored cap voltage. Will they drain or bleed off if I leave the unit unplugged for a period of time. Do I need to bleed them myself and if so how to do properly/safely. How many caps should there be (Crate Blue Voodoo Valve 6212). Anything that you guys can tell me will be worth gold. Thanks again for all your previous comments and suggestions on my previous post.

[Jazz P Bass]

If you do not have a volt meter, do not attempt it.