First, thank you for going to the doc so quickly. I can't tell you how many people I know who neglect to do this. Most skin cancers are very treatable, as long as they are caught early. There are too many sad stories out there about people who just didn't bother.
I have had 3 BCCs removed, 2 from my scalp and one from my arm. I also had a SCC removed from my arm. I tend to be a super overheater and it is uncomfortable, but I make an effort to always have my scalp covered when I am out running or whatever. I have thin hair and am one of the lucky women who has male pattern baldness, so I will also apply sunscreen to the more exposed parts of my scalp. I just use my daily moisturizer, which is SPF 30, most of the time. Am I perfect? No. But I do the best I can.
Re: the rest of me, I apply sunscreen to my face and neck every day and to any other exposed body parts if I am going to be out in the sun. I haven't gone as far as wearing SPF clothing (see "super overheater" comment above), but this is an option. There are many companies that make SPF clothing that is lightweight and might be tolerable for you. Something to look in to. Cover up when you can.
Honestly, the best thing you can do is just keep checking yourself and making and going to regular appointments with your dermatologist. Have your partner or a friend check your back on a regular basis. Ask your hairdresser to let you know if s/he sees anything weird on your scalp. It's likely that anything that pops up now will be a result of sun exposure from many years ago, and missing a few days of sunscreen now aren't going to make a huge difference. Also, things like SCC can and will show up where the sun don't shine. It's not only about sun exposure. Genetics seem to play a big role (according to my derm).
For those of us who love the outdoors and can't imagine life without it, we do the best we can. Be smart and enjoy and be grateful for your time outside. Establish a relationship with a single dermatologist, preferably one who maps your moles and other markings and does a thorough, head-to-toe exam.