I have a Coleman pop-up too. I love it! We pull it with our Montana Mini Van, and my husband is concerned about pulling it in areas with lots of mountains/hills. So we haven't left Indiana yet. BUT we are going to go to Ohio and Michigan this year. When we camp in Disney in a couple weeks, we are back in our tent.
We don't have air conditioning (sometimes I wish we did, but it hasn't been that bad, BUT we have always been able to camp under trees that protect us from the sun).
We have a portable heater in the camper and that is a MUST for cold nights. The other thing we got (and this suggestions came from Pop-Up Times) is those 'clip fans'. Those little round mini-fans that have large clamps on them. We clip them on the bar that goes over the bunks and each end has it's own 'ceiling fan'. Without the air conditioner, these fans have come in very handy and we use them a lot. During the day, I turn them to blow into the cabin part (if we are in the camper), at night I turn them in towards the bunks.
So if you don't get air-conditioning, those clip-fans are wonderful!
Also, I found a little dorm room microwave that we take with us. We also have a small TV/VCR, a toaster oven, and radio. That is about it for our electronics (which is a lot more than we could have in the tent). Oh yeah! We bought a Fridge that can run on car battery or outlets. The Fridge in the pop-up was never enough room for us, so we bought one from
Walmart. It has been great. I take it on trips and we carry food in it for our travels (it can lay like an ice cooler or you have it stand upright). In the camper we put the fridge in front of our sitting area and use it was a 'table'. It is crowded, but we manage. The Fridge is coming to Disney with us, event if it has to stay in the van.
It is going to be hard going back to the tent after having the pop-up for 2 years. But we will be in the parks most of the time anyway so we won't be spending too much time at the campsite.
OH! Another neat thing we got was a 'instant up' screen house from Target to put up over the picnic table. That is going with us to Disney too!
Debra