We adopted Bucky a GR mix about a week ago. He is now 11 weeks old. He seems to be doing really well with potty training

!!! I have only had one accident with him in the last 3 days!!! My problem starts at bedtime. He seems to hate his Kennel... During the day he goes in and out freely, I put treats inside and praise him when he goes in but at night he starts with a wimper and continues with real complaining last night for about 1 1/2 hrs before he fell asleep. He gets exercised and goes potty before we put him in the kennel. I know at this age he needs to go out during the night every few hrs but how do I get him to settle and sleep or will this come with time?
Thanks in advance for all the tips.