Highly recommend buying a portable battery operated air pump from Harbor Freight, Home Depot, etc.You probably want to have an Offroadairbuddy along to re-inflate the tires quickly. Talk to someone at Offroadairbuddy to see how many times one tank-full can re-inflate all 4 of your tires.
12V 100 PSI High Volume Air Inflator
Amazing deals on this 12V 100Psi High Volume Air Inflator at Harbor Freight. Quality tools & low prices.
And buy a real tire gauge, a tire patching tool, and some patches as well.
This has saved me 10+ times, Home Depot is nail city around here.
A heads up for Costco Tire folks, if you self patch a Costco tire they won't fix it (my experience).