hau Rebecca, may I recommend that you seek out a wood worker in your area, it is probable that they might want those trees and would be willing to pay for the removal costs to get the wood.
If those are true cedar trees, then you would want to locate a Luthier, true cedar is a wonderful top wood for guitars and mandolins. A good luthier would pay you for the tree since they would then have complete control of the aging and processing of the top wood.
If trees are in the way of your plans for your
land, then it is never bad to remove the ones that need to go. In the case of crowded trees, it is best for the trees that they be thinned so the survivors can flourish instead of get weak and become a hazard.
If you want to keep any of these trees but the branches are in the way of your progress, trim them off.
I trim my cedars to the point where I can walk under them without hitting any branches, (I am 6'2" and wear a cowboy hat when out on the farm working), I trim my trees so the lowest branches are 6'8" from the soil.
I would definitely try to get that walnut tree all the light that can be had, it is a valuable tree both for the harvest of nuts and for future wood should it finally perish.
There is a good amount of information on pruning fruit trees here on the site, by many experienced people.
The book I have used and recommend is "A Guide for Pruning Fruit Trees for a Productive Orchard" There are others but this one is quite complete and covers the different ways to prune fruit trees for best production and longevity of the tree.
Redhawk