1. When I did craft shows I only took cash, though I didn't have anything priced over £50, and I always knew where the nearest cash machine was.
2. In 5 years nobody mentioned using Paypal
3. Use a card reader for debit/credit cards such as Sumup, Square, etc. Check out costs involved with each, also mobile phone signal or wifi
wherever you go, they need these to work, might not be worth it for just a few show
4. Don't forget insurance, Public and Product Liability is a must.