Keep in mind folks AirTags are for lost items they are really not for theft and many folks have gone into great depth on the subject of why these aren't ideal for theft. Yes it is true there are a lot of companies jumping on the make some money train with AirTag holders for bikes but their efficacy as a theft tracker aren't great and if the thief has an iPhone they can just find and remove the tag and know someone was tracking and get a better chance of getting away. Plus out in more rural areas it will be less effective with fewer iPhones or no cell towers.

I would try to keep the bike closer and maybe not all places but a good number of places I have been with my bike especially while touring are pretty nice about letting me bring the bike in. Most people hearing you cycled with stuff are pretty amazed. I took a trip to visit a friend and her new baby and it was maybe 30 miles and everyone who also came over was shocked and stunned wow you biked all the way here with stuff (I was spending a few days) heck even when I went about 1.5 miles from work on my road bike that had a seat bag to hold clothes and stuff for work to eat a favorite restaurant they were amazed even when I said it was 1.5 miles here and maybe 7-8 miles home. Not in every situation mind you some people don't like bikes but if you are nice and friendly people will return in kind if they can. Obviously a little lock could prevent the quick theft and they might allow you to bring just bags in and still you are in a bit better shape.