Since my trip I finally learned how to post pictures so here are some scenes of Yaviza
(more to come, time's up right now)

Yaviza , north end as the Panamerican Highway entrs town.

The PanamanianArmy is the police force which looks after public security in the Darien. Here two soldiers are giving me,on the bike, a guided tour of the Yaviza main street loop and they pointed out the two hotels and waited as I assessed each for suitability.

Hotel Yadarien , the best hotel in Yaviza with an enclosed verandah just wide enough to park a motorcycle

The footbridge across the river in Yaviza, at left is the suburb and the FDarien Gap,at right is Yaviza.Note the real dugout canoe with a load of plantains and a flat stern for outboard motor.

The docks area in front of the restaurant ,where all the river freight gets moved to and from trucks

Breakfast in Yaviza in restaurant at the docks- fried plantains, fried sausage and coffe and a bottle of cold water. Very tasty, very Panama, narly all nutritional requirements.

The docks of Yaviza, seen from opposite side of the river bridge. Everybody who lives on the river has a boat tied up at the house.

The river docks on the Rio Tuira in Yaviza. This is the center of all traffic on th river into the Darien gap and to the coast.These boats are of typical wood construction but very modern adaptation if you see the flat stern to hold outboard motor.The small farmers upstream bring down loads of plantains, the green cooking bananas and transfer them to the buyer's trucks at the dock.Also they buy their suplies in town- notice the flats of eggs behind the lady.

The bridge across the Tuira river from downtown Yavuza .The "Gap" is on the other side, actually a suburb of Yaviza and foot trails to other jungle villages.
You could probably hitch a ride on some of the river boats to some of those villages , but do clear your plan with the folks at the army post and they may have some recommendations ..

The main street as you come in from Panama city.This is as wide as it gets

More dugout canoes below the foot bridge.Water level is low here but check all the notches higher up for hitching boats during wet season..

And this is the modern plastic,foam-filled outboard motor launch which could be more able to take the bulk of a bike for those desperate to really stuggle their way upstream into Colombia. Just make sure you know what you are getting into and check with the army post for permission and clearance and so they know where to start sending search parties.
A family group? hunting party? on the river beside the Panam CA 1 north of Yaviza

"suburban" street of Yaviza