Chris, really depends on use. You can get away with a tarp at most spots in the summer but it might be a bit dicey in spring going through some of the mountains on the Arizona Trail.

I can sew up a tarp that is quite sufficient, but wouldn't end up using it as much around here. I might manage it for the desert section of the Arizona Trail except for the snakes and scorpion. How do you find it in Colorado?

The coastal hikes here don't strictly require a tent in the summer but we've been getting a bit of rain this year and the North Coast Trail can get windy, foggy, and damp.

As for a sleeping pad, I've long passed using a regular Thermorest and the foam pads just don't do it anymore! Lightness and luxury cost, but good quality wins out in the long haul.