Hello digimark....
I'll throw in my two cents on the sleeping pads. I would recommend a Therm-A-Rest brand, self inflating pad. I have the large Trail Comfort pad and it does a pretty good job for me. At 25" wide, it's a little too narrow for my xtra wide body but it works OK.
If your not going to be hiking or packing the pad around you might want to check out the Camp & Comfort series. These are thicker and come in widths up to 30". Of course they are heavier and slightly bulkier, but would no doubt offer a better nights sleep.
Campmor.com currently has some pretty good deals on Therm-A-Rest items.

Just wanted to add this, don't get discouraged if your first night camping is less than comfortable. Camping takes some getting use to and is something that gets easier with experience. If you hang in there you will be glad you tried it. Having two sons to go camping with will make it worth the effort. I think you will have a great time!

Hope this helps,

smitty