Sorry Matt you won't make it home in time. If I remember you live out in the Delta so you have a couple of hour drive. The injections begin to work for me immediatly and last for just over one hour. If it lasts longer than 4 hours the doctor wants to bring it down quickly. That is somewhat unusual.
I started my injections three weeks ago and we are still working on the correct amount. My doctor prescribes only the Caverject kits. The injection is mostly painless, maybe a little ouch, but the problem is overcoming the thought of injections.
Some guys here are using the bimix and trimix injections. They are less expensive but must be prepared by a compounding pharmacist. I plan to try those if I don't get the success I need with Caverject. Some men complain of the pain and price with Caverject. You do get an ache in the penis and scrotum, but for me, so far, it has been tolerable. I am getting the 20 mcg injections.
Good luck, I'm sure others will share their experience too. If you have questions ...ask away.