on really really long trailers, one looooong streetside window awning can be a problem...
the roller tube will bow a bit and there is little flexibility in deployment.
with shorter or mid size streams this isn't really an issue.
many short awnings means more HOLES in the skin, more places to seal and so on...
and it's a bit annoying when washing (getting around the arms/struts)
the UPside to a full length side awning is...
covering skin space between windows means better cooling
and less water flowing UNDER d'stream when it rains.
my unit has 3 window sized awnings at the 3 rear bedroom windows (see da pic in the links) ...
AND a ~20 ft streetside awning that runs from lounge, past the galley and near the shower wall.
lots of little window awnings look cute, but full coverage on a 25 with ONE is a good idea.
this thread has a bunch of pics that reflect the various options...
((see posts #6, 19, 41, and 45))
here's a thread with lew' installing a full street version...
and another with art' doin' the same...