Got a new tent and some camping gear, so the wife and I plus our four year old are going to start doing some weekend camping. I need lots of tips though from experienced campers. We still need to get sleeping bags and something to lay on though. What is the best thing to sleep ON for comfort? Air mattreses? If so what do you recommend? How about sleeping bags? We'll be camping through to fall and fall can get some pretty chilly nights in these parts. Will cheapo sleeping bags cut it? What would you recommend for nights down to low 30's? More advice the better. Thanks.