[Con43]

If you are traveling thru IL and have a CCW from your home state then you are permitted to have your loaded CCW on you. If you leave your vehicle tho the CCW is required to be secured in the vehicle.
430 ILCS 66/40 Sec. 40
(e) Nothing in this Act shall prohibit a non-resident from transporting a concealed firearm within his or her vehicle in Illinois, if the concealed firearm remains within his or her vehicle and the non-resident:
(1) is not prohibited from owning or possessing a firearm under federal law;
(2) is eligible to carry a firearm in public under the laws of his or her state or territory of residence, as evidenced by the possession of a concealed carry license or permit issued by his or her state of residence, if applicable; and
(3) is not in possession of a license under this Act.
If the non-resident leaves his or her vehicle unattended, he or she shall store the firearm within a locked vehicle or locked container within the vehicle in accordance with subsection (b) of Section 65 of this Act.

Being Illinois, the word within could cause you potential problems on a bike/trike. Better to lock it up if set on going the Ill. route. JMO