No reservations, but I called beforehand to check availability and they very nice and let me know there would be space. Of course I took my time in the store during check-in. 🤠 Enjoy your stay, we did.

Cabela's RV Park is first-come, first-served - no reservations taken.

First come, first serve. Pay at the pay station or at Cabela’s. Best to get there in the afternoon to grab a spot.

They do not take reservations, first come first serve. Sidney in general, and the Cabelas there are not much of tourist destination. They fill up a bit in the evening and then pretty much emptied out by noon. They do have Sidney Gold Rush Days the 2nd weekend in June, a county fair in July, and an Oktoberfest the 1st full weekend in October. You might want to call to see how many sites are open, but I'd be surprised if they completely filled out. The best advice I can give you is to plan to arrive early in the afternoon.