Don’t worry about dark adaption. Get the intensifier. You will be blown away. It’s kind of a new way of observing so you have to toss out some old notions. The intensifier "light" is just not that strong.
If you want to look at the Milky Way, many NV users use camera lenses or 50mm guide scopes, etc. to get extremely wide field, low power NV views that will show you the Milky Way, literally, in a whole new light. The Milky Way is more impressive with NV than naked eye. With NV you will gain a whole new perspective and respect for our galaxy.
You could always start your session with glass and then move to NV. But to be honest there is no real need to do so and every time I put a glass eyepiece in the scope it is pulled out rather quickly.
Galaxies and clusters are all enhanced but just like with visual some are better seen than others. You will be able to resolve clusters that were previously difficult to resolve or just smudges. Many galaxies will become easier to spot. Cygnus will become filled with nebulas and Sagittarius will become so thick with stars that dark nebulas will be easy to see against the background glow. Some objects that were previously thought to be imaging targets will become observable.
Averted vision is still used because the universe is a rather large place and although NV makes many objects easier to see and with added details there are still new, faint objects that are the limit, just as there are still objects at the limit with the Hubble telescope.
The two filters that you need are a Pass filter (610 for mild light pollution and a 685 for heavy light pollution), for non-nebula objects, and a Ha filter (many start with a 6 or 7 nm Ha filter) for nebulas. Forget visual filters of any kind.
With NV, the wonder of the Milky Way is not diminished as a matter of fact it is “greatly enhanced”.
Your SCT for small stuff and your refractors for low power, wide field views are perfect. An SCT and refractors (achromatic refractors work well) are also what I use. If you don’t have one, a reducer for the SCT will come in handy. One look through a small, fast refractor with NV and you will probably want to go even wider, hence why many add camera lenses.
One session and you’ll figure out the minor adjustments you need to make or the added accessories you might want to add.
My intensifier is the best accessory I purchased in over 40-years of observing.
Have fun exploring a "new" Milky Way.