Recently I bought what I call an arc jack:
SeaSense EASY LIFT JACK
https://www.amazon.com/dp/B000FZ345S..._w7vREbCW8NDYQ
Each summer I see a few boats on trailers on the side of the road waiting for the owner to bring back a spare tire, jack, lug wrench or ALL of that. Having everything you need can save your day. I carry spare wheel bearings, seals, grease and what is required to change these roadside. I may lose a few hours of fishing but I'll get there!