Exactly, I usually take off and flyaway from the coast until I get to about 3-4k even if there is no sign of enemy aircraft around my field! This way when I get to about 3-4k I can turn back and head for the action knowing that not only will I have some altitude under my belt, but also I will be entering the danger area with a whole heap of speed and a well trimmed plane, and if I am really lucky with the sun at my back
It is well worth spending the extra 10 minutes at the start of the sortie and setting your self up, there is no future in being the one struggling for altittude, with no speed in reserve and having the enemy dropping down upon you!!
Craig