Any official rules for camouflaging objects?

[Felon]

Often enough my party wants to bring a cart along, then hide the thing before they go into the dungeon. Or conceal the entrance to a hideout so pursuers can't find them. Or stash some possessions in the woods before going into town. There are no rules in the PHB for hiding an object, and I don't recall seeing any elsewhere. It feels like I've got to house-rule something that should definitely been covered at some point over the years. The likely candidates would be Hide, Disguise, or Survival. If Disguise were based on Charisma like it probably should be, I'd go with it, but as it is I'm leaning towards Survival.

But before I take this over to house rules, I figure'd I'd stop by here and check to see if such rules already exist.

 

[Jack Simth]

Well, you can put illusions over things - Disintegrate and Illusory Wall are quite handy this way - study a (thick) section of wall for a while, tap it a few times for good measure, disintigrate a 10x10x10 hole, put stuff in it, and Illusory Wall the original appearence back. If you also have Wall of Stone or Wall of Iron, you can even put something solid back in it's place.

Edit:
Permanent Image can do essentially the same thing, but costs expensive material components.

 

[Corsair]

Depends on how you're doing it. In the case of camoflage, then I'd say a survival check, of course modified by the objects size penalty (probably -4 or -8 depending on the size of the cart in this case).

 

[domino]

As survival checks are what are used to located camouflaged locations, I'd use a survival check to disguise it.

 

[Khaalis]

There are rules for Camouflage Nets in Hero's of Battle. This covers exactly what you are looking for. its basically the same thing current day military use to camouflage objects and small camps on campaign. I dont have the book handy, but if you have access to it, its a sidebar in the Skills section.