^ .....lightweights.... .
Its entirely possible to have the 'real deal' outdoor camping experience while still retaining a degree of civility. Our fishing group, average age 59, does it all the time. The major nod to advancing age was finally acknowledging achy complaining knees and backs, and dispensing with air mattresses in favor of camping cots. Also a tent big enough that you can stand up comfortably is key, as is a taffeta-fill sleeping bag; do all that and you're basically golden. A top notch toolbox and a knowledge of knot-tying helps; on a trip off the beaten path past Gold River in October we tied together three massive tarps hung and strung them from some handy trees and probably had close to 500 sf of ground securely under them, put up our tents and presto we had our own mini-village, dry and safe from rain.
When we hit the back woods the one area we always splurge on is food: we never dine on anything less than high quality fare (it helps if you can cook!): that trip last fall was for 3 nights and 4 days and included Korean BBQ pork, garlic mashed potato's, smoked salmon, blackened chicken, greek salad, made from scratch turkey chilli and cannelloni - all very do-able for an event like this music festival. Of course if you still remain a tenderfoot even with all those comforts a well provisioned RV works too. We're actually looking at a rig that each of us in the group might kick in some $ for to that end. Now that would be ideal for a bunch of cranky older guys and would even potentially coax even me into a music weekend with a bunch of drunk punks