In a Juan O Savin interview a few weeks ago, Savin said Trump's complete SS detail went to Mara Lago with him. He added that they usually saty on at the WH.
That was a part of his reasoning of why he thinks Trump is still considered CiC by the military.
Just reporting what I heard, a few times, I think. Savin does a of of long interviews.
To be sure, Trump wouldn't need a SS detail other than what would be supplied to other former presidents. Is own security is legendary, so anything other than usual SS procedure indicates, to me, an urgent need to know condition relating to current national conditions.
I definitely think long delays between the publicized speech starting time and Trump's actual appearances on the stage are a security procedure, though.
Long delays like that would normally be considered a no-no and rude, especially since there is down time between the preceding speakers and Trump's.