Update!
By last evening, this is what I had accomplished with my veggie beds:
Well, a little more than that, but that's the only part that was actually watering a plant. DH got me started with some basics, and then he and I installed several manifolds (brilliant suggestion from a friend). And then I really wasn't sure what I wanted to do. Another friend suggested that even though I have the boxes, I might want to keep the tomatoes in pots - they grow well there, and it leaves room for less space-hoggy plants. Anyway, I do already have them in pots and didn't want to replant them, so - the first drip line I ran was into an existing tomato pot. The smallest one.
I went outside during this afternoon's run to check the water level, and that's how I found out one of my plugs wasn't working and there was water spraying everywhere. I figured out what was going on, I think, snipped the offending length of tubing and shoved a new plug in. Fingers crossed that it doesn't spit the plug out again.
I can't do a lot of physical stuff, so I had to ask DH to move the remaining two tomato plants, in much larger pots. He said he'd try. So today, he moved one huge pot with a dolly. It went fine, but he found it awkward. Decided to move the second huge pot by just carrying it. He huffed and he puffed and he managed to get it to the veggie box - and he dropped the pot onto the ledge with the last of his strength - and the bottom of the pot just cracked. Like, a lot. Chunks of terra cotta fell off the side. Suddenly things got serious.
I suggested that we just plant it into the ground with the pot still around it and retrieve the shards next spring, but he didn't want terra cotta pieces in the dirt. Long story short, the tomato plant is in the ground, sans pot, and DH has two big deep slices cut into his fingers. Neither of us thought to use gloves =/ FYI - terra cotta is SHARP.
The plant in the damaged pot was so far our best producer - two tomatoes almost ready to harvest. DH doesn't think it will be too upset at being transplanted since we kept all the soil. I'm not convinced - the bottom of the root ball broke off, at least partially, maybe entirely. We'll see, I guess. Can't time travel.
Good news - I'm getting better at inserting emitters into 1/4" tubing. I figured out that if you tilt the tool so that the emitter is at the bottom instead of the side, it works way better. I had originally installed a 2 gallon per hour emitter for the first tomato plant, but I had somehow overlooked that the half hour program runs three times a day ... 2GPH is way too much. So I installed 1GPH emitters all around for the tomato plants, and we'll see if that's about right.
I've never understood the first thing about our sprinkler system, but it's pretty fun to do this stuff, and after a few basics, fairly intuitive. And messy =) Even without mountain biking, I have the chance to get muddy. Good times!