Does the "west evens / east odds" rule apply when flying without a specific destination (sightseeing, etc)? I understand about the rule about odd / even (+500ft) separation at altitudes above 3,000ft AGL, but what about when you're flying without a definitive destination such as sightseeing where your track might change often? I realize that the solution isn't to continuously change altitudes, but what is the generally accepted rule here?

UPDATE: To be clear, I'm not suggesting sightseeing above 3,000ft or anything like that, but rather what is the rule (if any) to help with safety in regards to collision avoidance when flying with no definitive track. Is it normal / expected to be able to simply just fly-about at any altitude?
14 CFR 91.159 says:


  Except while holding in a holding pattern of 2 minutes or less, or
  while turning, each person operating an aircraft under VFR in level
  cruising flight more than 3,000 feet above the surface shall maintain
  the appropriate altitude or flight level prescribed below, unless
  otherwise authorized by ATC: [etc.]


So if you're above 3000' AGL and not turning or in a hold, then you're required to follow the odd/even rule. Personally, I've never found it to be an issue because if I'm on a sightseeing flight or just following a river or whatever for fun then I'm usually below 3000' AGL anyway (and 91.159 is one of the reasons why).