hidden units and transports

[t1M0t8yk]

  I have another rules question.  Hopefully the PGHQ community will respond soon to this and the question I posted yesterday about light woods.

  Can transports be hidden with combat units and count as one unit hidden?  For example, I may hide three units.  I'm hiding three AT gun batteries.  It makes sense their transports would be hidden with them, but the scenario permits only three hidden units.  If the transports may not be hidden and I locate them near the guns I'm tipping off their location, which compromises the effectiveness of the hidden units.

  It seems to me the hidden units rule should specify that combat units are to be hidden, and non-combat unit transports may also be hidden with them without being counted among the number limit for hidden units.