"I have trained/handled several retrievers to Seasoned titles in HRC."
Having run several retrievers in Seasoned HRC and Senior AKC, you may find that
the line will not be as "busy" as HRC in that you will not have to shoot/handle a real gun.
This means you will be able to focus totally on your dog (which is a good thing). However,
the live flyer presents an excitement issue if you have not done many (for some dogs).
As for the blinds in Senior (having run many), the grounds provided for Senior tests
often present a problem in that avoiding a cheating shoreline may require some thought.
Judges often will skirt this issue by saying the dog should get into the water going out
and coming back. The difference between should and must varies from judge to judge
and the grounds provided.
The idea that the dog should not be out of sight on the way to the blind is the norm.
However, I have had Senior tests where that was not always easy. Look at the blind
in terms of where a dog might get off line and quickly out of sight. Proactively stop the
dog in sight before possibly loosing sight and cast to avoid the issue. No NOT let the
dog hunt up the blind when you get close to it.
Note: In general, the marks and blinds will be longer in Senior as opposed to Seasoned.
Also, it helps if you can watch some of the dogs run before you to find out where there
might be something to anticipate and thus be better prepared to deal with it.
Lastly, it is best if you are over prepared.
Note: From the original quote about running several dogs in Seasoned, Senor should
prove to be a fun new alternative.