Tales from the Doghouse ,
I really enjoyed reading your post , and , could not help getting the feeling that I should keep my mouth closed because that first paragraph describes a loving environment that I would wish every pet could have. Made my day...............
The training class was a very good idea and I'm glad you found a good trainer that you like and is available to answer questions from time to time.
My guess is that when you let your dogs out it is into a fenced area. The howl/bark from Dexter when he goes outside with Tonka is the same as the rush a child would get stepping onto a new playground everyday that is full of sight , sound and scents that are the absolute high point in a hunting dogs life.
This is a fact of life with hunting breeds , however , this can be buffered with training and the inside barking can for sure be corrected to an acceptable level.
There are several way to train/correct a barking problem and one of the best examples of this is the Kikopup series of video shorts on youtube by Emily Larlham. Many trainers put barking on cue and then train a quiet command , all done with positive reward based training which is what I use most with my rescue dogs.
Example:
http://www.youtube.com/watch?v=Jp_l9C1yT1g
Teaching Woof/Shush:
http://www.dogstardaily.com/training/excessive-barking
A good resource:
http://www.amazon.com/gp/product/19...mp=1789&creative=9325&creativeASIN=1929242514
Training for attention , eye contact :
http://www.youtube.com/watch?v=eiMGJBxRtBw
Great resource , Emily Larlham , Kikopup :
http://clicktreat.blogspot.com
Keep in mind that your dogs will be best served using mental stimulation and general play/exercise on a regular basis together with individual short training sessions that can be done inside or out weather permitting.
Example of some inside fun games to play:
http://www.youtube.com/watch?v=EJxG--4t3SU&feature=player_embedded
A little obedience work on a regular basis to keep your dogs receptive to new training. I would take what you have learned from your training class and do a refresh of basic commands with both dogs. Then , start training "Quiet" on an individual basis with both dogs.
Keep things fun with short sessions and lots of small treats.
I could talk for several days , however , I think you will find enough information here to serve your needs well. Pay close attention to the technique and timing of rewards in Kikopup vids. Let me know what you think............
Best , oldhounddog