Absolutely prep for our 3 pets. I have extra treats set back as well as food and water. Also, 2 have packs, and I have a stroller for one. (don't laugh, it will serve 2 purposes- carry my 6lb princess AND extra water).
Moses has a large Ruffwear Palisades Dog Pack. I LOVE this pack! 2 - 2 liter water bladders that will help keep his sides cool. 2 HUGE pouches that will hold quite a bit of food, and the saddle pouches come off from the actual harness to give him a break when we rest. Also a handle on the top of the harness between the packs to grab quickly if he slips or needs an extra boost up. Have a tie out cable, a couple of raw hides, treats, boots, shot records, collapsible bowls, a mini mag light on both packs, and an extra light in both packs, food, water, and I do have a couple of first aid items in Moses pack, but most of their first aid is in with ours. Extra leashes also and a tennis ball. Probably a couple of more things I am not remembering to list.
Copper has an Outward Hound H2O Hydration Dog Backpack. It has a small pouch, but since he is older, I figured the 2 liter bladder would be enough for him to carry. His pack will carry the collapsible bowls, his boots and his water.
Abby, (she is small enough to be carried but to small to hoof it to far by herself) she is 6 lbs-- have a doggie stroller for her which as funny as that sounds would really come in handy if we had to hoof it. It holds A LOT, plus her. The wheels have shocks on them as well, so if we were going through rough terrain, it would not be bouncing from here to kingdom come.
I have their first aid in with ours. I have a 6 month supply of heartgaurd and 6 month supply of Frontline for all 3.
I also have Foriflora in case they may get into some bad water. (we already had that issue with Moses at the doggie park) So, I decided to get an extra box (30 pkts) of probitics...just in case. Also, have extra eyedrops for Abby, as she has chronic dry eye.
Since water will be the biggest issue having our 3 dogs, I am taking extra steps to insure we have enough, yet don't have to try to pack it all ourselves. Water is HEAVY. 1 gallon = 8lbs, so the less we have to pack (hence the stroller) the happier everyone will be....
I DO need to get some pain meds from the vet for each of them. She knows we do a lot of outdoor stuff, and she has given us extra meds before.