Meade 10" Lightbridge
You did good to allow your Lightbridge enough cool down time.
Could be a number of things. Is your Lightbridge properly collimated? You might expect that a new scope would be properly collimated, but not so. Shipping and assembly can cause misalignment. Do you have a shroud for the Lightbridge? If there was a breeze of any kind, that could cause some air currents in the optical path and that can reduce performance. Your DS, of course, needs no shroud. Lastly, there will be nights that are clear and mild, but seeing conditions will be none-the-less poor in terms of either stability, transparency or both and, yes, larger scopes are sometimes more sensitive to seeing conditions than smaller scopes. All in all, I would not place too much weight on one night out. It's going to take a number of nights with any telescope to get a fair reading on performance, assuming everything is in good working order on the scope. Give it a couple more times and let us know your progress.
Yes, that is correct. There is a good article on reflector collimation online at Sky and Telescope here. As for tools, I still like the old Cheshire tools, such as the Celestron collimation specialty for scopes that are way out of alignment because it tells you if the secondary or the primary is off. Laser tools are great for less serious cases of misalignment, but they don't pinpoint whether it is the secondary or primary that is off, though most of the time it is the primary. Lasers are, though, much easier to use. Takes a bit of work to figure out how to use a Cheshire, properly.