Hi digimark
I've had a quick look on the REI website; Lots and Lots of excellent gear. Although expensive everything would be able to double up for trekking apart from the Tent but will still allow you to be comfortable whilst car camping.
For the Tent.
http://www.rei.com/product/732924?vcat=REI_SSHP_CAMPING_TOCThe Kelty Pavilion 4 Tent looks superb; Strictly for car camping though at 20 lbs. 3 oz. For trail camping something like the
http://www.rei.com/product/731624 Marmot Marmot Aeolos 2P Tent looks the business at 5 lbs. 12 oz. 2 required for 4 people.
For Sleeping Bags.
http://www.rei.com/product/747386Marmot Wasatch +25 Sleeping Bag - Regular - plus points - Nice and wide at the shoulder and light enough to carry on the trail aswell as for car camping at 2 lbs. 12 oz. Good Durable 3 season bag.
For Sleeping Pads.
http://www.rei.com/product/720780Exped DownMat 9 Deluxe Air Pad. A really comfortable sleeping pad; as comfortable as anything from Thermarest weighing 3 times as much; Can still be used for Trekking at 2 lbs. 12 oz. But the standard Exped DownMat 9 Air Pad is narrower and weighs less at 2 pounds.
For Camping Stove/Stoves;
http://www.rei.com/product/696978Snow Peak Giga Power Blended Fuel Stove; 11.25 ounces; reasonably lightweight with better stability than normal stoves; Get a couple and use with 500 gram canisters for car camping. Use in conjuction with a table for cooking such as the one found at
http://www.rei.com/product/721713?vcat=REI_SSHP_CAMPING_TOCFor Cooking Utensils
http://www.rei.com/product/708986?vcat=REI_SSHP_CAMPING_TOCMSR Duralite is a good compromise between cost and functionality and again would be able to double up for trail camping.
For Headlamps
http://www.rei.com/product/751760Petzl Tikka XP LED Headlamp: Not as powerful as the Princeton Tec Apex Pro LED Headlamp but not as expensive and just fine for car and trail camping being lightweight and compact using AAA batteries.
Hope this helps with respect to actual gear.