You want 11 feet. I've got a Nautique in the years you mention. My garage is 10' (more like 9'11'' or so). My goalposts are 9'8''. It has never been fun to back it in, or, pull it forward.
The 102 inch limit is largely misunderstood. The Feds do not require the States to issue special permits for anything under 102 inches. As best as I can tell in Missouri, the state regulations really don't speak to special one-time permits until the width is 12 feet, and, the regulations have rules for widths all the way up to 16 feet. I believe I have seen wider (it looked like a section of a cracking tower for a refinery, and it was laid on three low deck trailers linked together, and was towed and pushed by semi tractors in both the front and the back, as well as was accompanied by 5 auxiliary vehicles blocking all highway ON ramps as the rig approached).
Here's a statement of the federal rule.
Re 102 inches.
The maximum width limit for CMVs [Commercial Motor Vehicles, namely buses and freighters] on the NN [National Network] and reasonable access routes was originally established at 102 inches, except for Hawaii where it is 2.74 m (108 inches). (See discussion of Reasonable Access on page 12.) To standardize vehicle width on an international basis, the 102-inch width limit was interpreted to mean the same as its approximate metric equivalent, 2.6 meters (102.36 inches) (Figure 1).
Federal width limits do not apply to special mobile equipment, which consists of self-propelled vehicles not designed or used primarily for the transportation of persons or property and only incidentally moved over the highways. Special mobile equipment includes the following, when moving under their own power: military or farm equipment; instruments of husbandry; road construction or maintenance machinery; and emergency apparatus, including police and fire emergency equipment. Federal rules do not require States to issue overwidth permits before allowing operation of special mobile equipment. However, if States wish to allow other vehicles more than 102 inches wide (i.e. non-special mobile equipment) to operate on the NN [National Network], then States must issue special overwidth permits.