The standing headroom in a Catalina 22 with pop top is 5 foot 8 inches, so if you’re taller than that you still can not stand up straight to put your pants on in the morning.
With a pop top enclosed it gives you a lot of extra storage room when overnighting. The enclosure attaches around the outside edges of the whole cabin top and with just the center of the cabintop raised this gives you a 18 to 24 inch shelf on 3 sides to store all of the stuff you had sitting on the bunks, clothes, extra bedding, food and etc.
Go the extra mile and get what is called the new style Catalina which is a 1986 and up, it has a better galley setup, more headroom in the V-berth, a 48 quart cooler acts as the step down into the cabin, better scuppers for draining the cockpit, a fuel tank locker, anchor locker and easier access to storage under the cockpit.
The Catalina 22 has it’s flaws but, with every possible replacement part available, the ownership base and knowledge makes it the very best trailersailor to search for.
And yes, the very first thing to do is get rid of the roller furler if you plan on just trailersailing it.