I also do the same on the oil pan.See in the pic how there was a little squeezed out I than run my finger down the side of the pan and block,just like caulking along you tub to get a great seal.Each to his own.
I do this almost the exact same way, however,,,
When I was in the trans business they always put the RTV on the pans that only used sealants and filled the trans as soon as the car was back on the ground and I don't remember it ever being a problem.
So on that note, I don't wait to fill and run right away after using RTV.
I did the same with the intake ends, (got it all together and fired it up)
I have almost no blowby though, so maybe I just got lucky.
Tightening slowly on gaskets with sealer on both side is very good advise.